Auto merge of #22780 - Manishearth:webrtc, r=jdm

Initial webrtc and getUserMedia DOM support

This is able to reach the point where connections are properly negotiated and ready to exchange streams.

<s>The `toJSON()` stuff doesn't work yet, so most example code will need to be tweaked to manually construct JSON first before sending SDP and ICE messages over websockets. I'll add support for this soon. (This may need webidl tweaks to support `[Default]` and `toJSON()`)</s>

For some reason I haven't yet figured out, connections are one-way, Servo is able to receive streams but the other end doesn't see the streams Servo sends. I don't think this is due to https://github.com/servo/media/issues/191, but that bug is making it harder to test.

This implementation simply drops streams that it receives, without connecting them up to any output elements, since servo-media-player doesn't yet have mediastream support.

Since servo can neither effectively send nor receive streams this implementation isn't useful yet, however it is getting large and I figured I'd get it reviewed and landed early as a base.

r? @jdm

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19 files changed, 1261 insertions, 46 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 75466042275..d5c41b0d23f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -60,7 +60,7 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "android_log-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -152,7 +152,7 @@ dependencies = [
  "bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-channel 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "mach 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -224,7 +224,7 @@ dependencies = [
  "clap 2.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "hashbrown 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "peeking_take_while 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 0.4.26 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -435,7 +435,7 @@ dependencies = [
  "euclid 0.19.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "gleam 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "malloc_size_of 0.0.1",
  "malloc_size_of_derive 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "offscreen_gl_context 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -756,7 +756,7 @@ dependencies = [
  "arrayvec 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-utils 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "memoffset 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "scopeguard 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -770,7 +770,7 @@ dependencies = [
  "arrayvec 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-utils 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "memoffset 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "scopeguard 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -783,7 +783,7 @@ dependencies = [
  "arrayvec 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-utils 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "memoffset 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "scopeguard 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1033,7 +1033,7 @@ name = "dwrote"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1052,7 +1052,7 @@ dependencies = [
  "crossbeam-channel 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "keyboard-types 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "msg 0.0.1",
  "num-derive 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1336,7 +1336,7 @@ dependencies = [
  "gfx_traits 0.0.1",
  "harfbuzz-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "malloc_size_of 0.0.1",
@@ -1407,7 +1407,7 @@ dependencies = [
  "bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "glib-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gobject-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1436,7 +1436,7 @@ dependencies = [
  "core-foundation 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-graphics 0.17.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "gl_generator 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "objc 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "osmesa-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1491,7 +1491,7 @@ dependencies = [
  "gstreamer-base 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gstreamer-base-sys 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gstreamer-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1506,7 +1506,7 @@ dependencies = [
  "glib-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gobject-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gstreamer-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "muldiv 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-rational 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1625,6 +1625,33 @@ dependencies = [
 ]
 
 [[package]]
+name = "gstreamer-sdp"
+version = "0.12.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sdp-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "gstreamer-sdp-sys"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "glib-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "gstreamer-sys"
 version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1666,6 +1693,34 @@ dependencies = [
 ]
 
 [[package]]
+name = "gstreamer-webrtc"
+version = "0.12.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "glib 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sdp 0.12.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-webrtc-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "gstreamer-webrtc-sys"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "glib-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sdp-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "gvr-sys"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1854,7 +1909,7 @@ dependencies = [
  "bytes 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.12.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "linked_hash_set 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "openssl 0.10.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "openssl-sys 0.9.35 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1975,7 +2030,7 @@ dependencies = [
  "bincode 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-channel 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2132,7 +2187,7 @@ dependencies = [
  "ipc-channel 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "layout 0.0.1",
  "layout_traits 0.0.1",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "malloc_size_of 0.0.1",
@@ -2178,7 +2233,7 @@ dependencies = [
 
 [[package]]
 name = "lazy_static"
-version = "1.0.0"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -2592,7 +2647,7 @@ version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cc 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2601,7 +2656,7 @@ version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cc 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "mozjs_sys 0.61.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2665,7 +2720,7 @@ dependencies = [
  "hyper_serde 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "immeta 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libflate 0.1.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "malloc_size_of 0.0.1",
@@ -2719,7 +2774,7 @@ dependencies = [
  "hyper_serde 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "image 0.20.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "malloc_size_of 0.0.1",
  "malloc_size_of_derive 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2857,7 +2912,7 @@ dependencies = [
  "euclid 0.19.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "gl_generator 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gleam 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libloading 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "objc 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2880,7 +2935,7 @@ dependencies = [
  "bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "openssl-sys 0.9.35 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -3189,7 +3244,7 @@ version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "crossbeam-deque 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -3363,7 +3418,7 @@ dependencies = [
  "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "jstraceable_derive 0.0.1",
  "keyboard-types 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "malloc_size_of 0.0.1",
@@ -3584,7 +3639,7 @@ dependencies = [
  "gleam 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "glutin 0.19.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "keyboard-types 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libservo 0.0.1",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "osmesa-src 0.1.0 (git+https://github.com/servo/osmesa-src)",
@@ -3636,17 +3691,18 @@ dependencies = [
 [[package]]
 name = "servo-media"
 version = "0.1.0"
-source = "git+https://github.com/servo/media#4bed1cdc9dc9cc825080ae2d8d1dfa776b042199"
+source = "git+https://github.com/servo/media#593fcabd749e693de51d609688d29497c668c667"
 dependencies = [
  "servo-media-audio 0.1.0 (git+https://github.com/servo/media)",
  "servo-media-gstreamer 0.1.0 (git+https://github.com/servo/media)",
  "servo-media-player 0.1.0 (git+https://github.com/servo/media)",
+ "servo-media-webrtc 0.1.0 (git+https://github.com/servo/media)",
 ]
 
 [[package]]
 name = "servo-media-audio"
 version = "0.1.0"
-source = "git+https://github.com/servo/media#4bed1cdc9dc9cc825080ae2d8d1dfa776b042199"
+source = "git+https://github.com/servo/media#593fcabd749e693de51d609688d29497c668c667"
 dependencies = [
  "boxfnonce 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byte-slice-cast 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3663,8 +3719,9 @@ dependencies = [
 [[package]]
 name = "servo-media-gstreamer"
 version = "0.1.0"
-source = "git+https://github.com/servo/media#4bed1cdc9dc9cc825080ae2d8d1dfa776b042199"
+source = "git+https://github.com/servo/media#593fcabd749e693de51d609688d29497c668c667"
 dependencies = [
+ "boxfnonce 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byte-slice-cast 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "glib 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "glib-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3675,12 +3732,16 @@ dependencies = [
  "gstreamer-app 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gstreamer-audio 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gstreamer-player 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sdp 0.12.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "gstreamer-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "gstreamer-video 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-webrtc 0.12.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo-media-audio 0.1.0 (git+https://github.com/servo/media)",
  "servo-media-player 0.1.0 (git+https://github.com/servo/media)",
+ "servo-media-webrtc 0.1.0 (git+https://github.com/servo/media)",
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "zip 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -3688,7 +3749,7 @@ dependencies = [
 [[package]]
 name = "servo-media-player"
 version = "0.1.0"
-source = "git+https://github.com/servo/media#4bed1cdc9dc9cc825080ae2d8d1dfa776b042199"
+source = "git+https://github.com/servo/media#593fcabd749e693de51d609688d29497c668c667"
 dependencies = [
  "ipc-channel 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3696,6 +3757,14 @@ dependencies = [
 ]
 
 [[package]]
+name = "servo-media-webrtc"
+version = "0.1.0"
+source = "git+https://github.com/servo/media#593fcabd749e693de51d609688d29497c668c667"
+dependencies = [
+ "boxfnonce 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "servo-skia"
 version = "0.30000020.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -3749,7 +3818,7 @@ dependencies = [
  "env_logger 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.19.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "getopts 0.2.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3775,7 +3844,7 @@ dependencies = [
 [[package]]
 name = "servo_media_derive"
 version = "0.1.0"
-source = "git+https://github.com/servo/media#4bed1cdc9dc9cc825080ae2d8d1dfa776b042199"
+source = "git+https://github.com/servo/media#593fcabd749e693de51d609688d29497c668c667"
 dependencies = [
  "proc-macro2 0.4.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3786,7 +3855,7 @@ dependencies = [
 name = "servo_rand"
 version = "0.0.1"
 dependencies = [
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "uuid 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3796,7 +3865,7 @@ dependencies = [
 name = "servo_remutex"
 version = "0.0.1"
 dependencies = [
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -3845,7 +3914,7 @@ name = "shared_library"
 version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -3927,7 +3996,7 @@ dependencies = [
  "andrew 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "dlib 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "memmap 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "nix 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3966,7 +4035,7 @@ name = "string_cache"
 version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "new_debug_unreachable 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "phf_shared 0.7.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "precomputed-hash 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -4019,7 +4088,7 @@ dependencies = [
  "indexmap 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "itoa 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "malloc_size_of 0.0.1",
  "malloc_size_of_derive 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -4200,7 +4269,7 @@ name = "thread_local"
 version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -4634,7 +4703,7 @@ version = "0.21.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "dlib 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -4704,7 +4773,7 @@ dependencies = [
  "fxhash 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "gleam 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "image 0.20.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -4841,7 +4910,7 @@ dependencies = [
  "core-foundation 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-graphics 0.17.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "image 0.20.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "objc 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -4910,7 +4979,7 @@ name = "x11-dl"
 version = "2.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -5110,9 +5179,13 @@ dependencies = [
 "checksum gstreamer-base-sys 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1eb57a7d013604ab7af2b843b62b13b8fb30f22d066919f7e198f528c3296cd0"
 "checksum gstreamer-player 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1144c6c5c3af25dd1f89b4f9d2762f1c2d8789e65cdc79e2451dd24350d84dd2"
 "checksum gstreamer-player-sys 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f0e642cb58d3733e2724def7186101bb00144fc97d45b2c379eba6d0c0662dec"
+"checksum gstreamer-sdp 0.12.2 (registry+https://github.com/rust-lang/crates.io-index)" = "047223a666099fd59b357e2db72638bf486d04cff206dc78902f05e9e6260202"
+"checksum gstreamer-sdp-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7e4db988cfb5a31c422964dcf5d458e878dbe446828c7ab38bf27e9ee47cc0bc"
 "checksum gstreamer-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "548bbd6a222826340953d2c1d50c3695463719cfb6414499300de5909a6ba1ea"
 "checksum gstreamer-video 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0c1f04816d7e183714830da26274f97e7aeff09ae6641058538d21443b4ec07d"
 "checksum gstreamer-video-sys 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d0e2efb301a0b94fa4af503122faa04247085936dd888fd59fa4e21eab3cbd37"
+"checksum gstreamer-webrtc 0.12.2 (registry+https://github.com/rust-lang/crates.io-index)" = "247eb5d55a42f1e15200c9e6ff7d854034219798713515c11bd875da0c7d144f"
+"checksum gstreamer-webrtc-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c57e396dd61d0b8e55653e801bc906ef32409f3fcbf26b9614167712765c7c80"
 "checksum gvr-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b1334b94d8ce67319ddc44663daef53d8c1538629a11562530c981dbd9085b9a"
 "checksum h2 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "a27e7ed946e8335bdf9a191bc1b9b14a03ba822d013d2f58437f4fabcbd7fc2c"
 "checksum half 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "63d68db75012a85555434ee079e7e6337931f87a087ab2988becbadf64673a7f"
@@ -5151,7 +5224,7 @@ dependencies = [
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
 "checksum keyboard-types 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "53b536dc22c0dabb295e85dbd0c062023885b12b8db24e1d86833f4e50ea7959"
 "checksum khronos_api 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "62237e6d326bd5871cd21469323bf096de81f1618cd82cbaf5d87825335aeb49"
-"checksum lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c8f31047daa365f19be14b47c29df4f7c3b581832407daabe6ae77397619237d"
+"checksum lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a374c89b9db55895453a74c1e38861d9deec0b01b405a82516e9d5de4820dea1"
 "checksum lazycell 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d33a48d0365c96081958cc663eef834975cb1e8d8bea3378513fc72bdbf11e50"
 "checksum leak 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "bd100e01f1154f2908dfa7d02219aeab25d0b9c7fa955164192e3245255a0c73"
 "checksum leaky-cow 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "40a8225d44241fd324a8af2806ba635fc7c8a7e9a7de4d5cf3ef54e71f5926fc"
@@ -5269,6 +5342,7 @@ dependencies = [
 "checksum servo-media-audio 0.1.0 (git+https://github.com/servo/media)" = "<none>"
 "checksum servo-media-gstreamer 0.1.0 (git+https://github.com/servo/media)" = "<none>"
 "checksum servo-media-player 0.1.0 (git+https://github.com/servo/media)" = "<none>"
+"checksum servo-media-webrtc 0.1.0 (git+https://github.com/servo/media)" = "<none>"
 "checksum servo-skia 0.30000020.1 (registry+https://github.com/rust-lang/crates.io-index)" = "63abd6bed50aaf0e348d9fe8104088d61d5b67fd47cbbdc822278f5bed82b5f5"
 "checksum servo_media_derive 0.1.0 (git+https://github.com/servo/media)" = "<none>"
 "checksum sha-1 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "51b9d1f3b5de8a167ab06834a7c883bd197f2191e1dda1a22d9ccfeedbf9aded"
diff --git a/components/atoms/static_atoms.txt b/components/atoms/static_atoms.txt
index db5680256f7..74f24a23e30 100644
--- a/components/atoms/static_atoms.txt
+++ b/components/atoms/static_atoms.txt
@@ -36,6 +36,7 @@ fullscreenerror
 gattserverdisconnected
 hashchange
 hidden
+icecandidate
 image
 input
 invalid
@@ -54,6 +55,7 @@ message
 monospace
 month
 mouseover
+negotiationneeded
 none
 number
 onchange
diff --git a/components/script/dom/bindings/trace.rs b/components/script/dom/bindings/trace.rs
index e92d1d5c452..3e20fab1dcf 100644
--- a/components/script/dom/bindings/trace.rs
+++ b/components/script/dom/bindings/trace.rs
@@ -101,6 +101,7 @@ use servo_media::audio::graph::NodeId;
 use servo_media::audio::panner_node::{DistanceModel, PanningModel};
 use servo_media::audio::param::ParamType;
 use servo_media::player::Player;
+use servo_media::webrtc::{MediaStream as BackendMediaStream, WebRtcController};
 use servo_media::Backend;
 use servo_url::{ImmutableOrigin, MutableOrigin, ServoUrl};
 use smallvec::SmallVec;
@@ -483,6 +484,8 @@ unsafe_no_jsmanaged_fields!(AudioContext<Backend>);
 unsafe_no_jsmanaged_fields!(NodeId);
 unsafe_no_jsmanaged_fields!(AnalysisEngine, DistanceModel, PanningModel, ParamType);
 unsafe_no_jsmanaged_fields!(dyn Player);
+unsafe_no_jsmanaged_fields!(WebRtcController);
+unsafe_no_jsmanaged_fields!(dyn BackendMediaStream);
 unsafe_no_jsmanaged_fields!(Mutex<MediaFrameRenderer>);
 unsafe_no_jsmanaged_fields!(RenderApiSender);
 unsafe_no_jsmanaged_fields!(ResourceFetchTiming);
diff --git a/components/script/dom/mediadevices.rs b/components/script/dom/mediadevices.rs
new file mode 100644
index 00000000000..e018087a86c
--- /dev/null
+++ b/components/script/dom/mediadevices.rs
@@ -0,0 +1,59 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::codegen::Bindings::MediaDevicesBinding::MediaStreamConstraints;
+use crate::dom::bindings::codegen::Bindings::MediaDevicesBinding::{self, MediaDevicesMethods};
+use crate::dom::bindings::reflector::reflect_dom_object;
+use crate::dom::bindings::reflector::DomObject;
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::eventtarget::EventTarget;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::mediastream::MediaStream;
+use crate::dom::promise::Promise;
+use dom_struct::dom_struct;
+use servo_media::ServoMedia;
+use std::rc::Rc;
+
+#[dom_struct]
+pub struct MediaDevices {
+    eventtarget: EventTarget,
+}
+
+impl MediaDevices {
+    pub fn new_inherited() -> MediaDevices {
+        MediaDevices {
+            eventtarget: EventTarget::new_inherited(),
+        }
+    }
+
+    pub fn new(global: &GlobalScope) -> DomRoot<MediaDevices> {
+        reflect_dom_object(
+            Box::new(MediaDevices::new_inherited()),
+            global,
+            MediaDevicesBinding::Wrap,
+        )
+    }
+}
+
+impl MediaDevicesMethods for MediaDevices {
+    /// https://w3c.github.io/mediacapture-main/#dom-mediadevices-getusermedia
+    fn GetUserMedia(&self, constraints: &MediaStreamConstraints) -> Rc<Promise> {
+        let p = Promise::new(&self.global());
+        let media = ServoMedia::get().unwrap();
+        let mut tracks = vec![];
+        if constraints.audio {
+            if let Some(audio) = media.create_audioinput_stream() {
+                tracks.push(audio)
+            }
+        }
+        if constraints.video {
+            if let Some(video) = media.create_videoinput_stream() {
+                tracks.push(video)
+            }
+        }
+        let stream = MediaStream::new(&self.global(), tracks);
+        p.resolve_native(&stream);
+        p
+    }
+}
diff --git a/components/script/dom/mediastream.rs b/components/script/dom/mediastream.rs
new file mode 100644
index 00000000000..49550c97521
--- /dev/null
+++ b/components/script/dom/mediastream.rs
@@ -0,0 +1,45 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::cell::DomRefCell;
+use crate::dom::bindings::codegen::Bindings::MediaStreamBinding;
+use crate::dom::bindings::reflector::reflect_dom_object;
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::eventtarget::EventTarget;
+use crate::dom::globalscope::GlobalScope;
+use dom_struct::dom_struct;
+use servo_media::webrtc::MediaStream as BackendMediaStream;
+use std::mem;
+
+#[dom_struct]
+pub struct MediaStream {
+    eventtarget: EventTarget,
+    #[ignore_malloc_size_of = "defined in servo-media"]
+    tracks: DomRefCell<Vec<Box<BackendMediaStream>>>,
+}
+
+impl MediaStream {
+    pub fn new_inherited(tracks: Vec<Box<BackendMediaStream>>) -> MediaStream {
+        MediaStream {
+            eventtarget: EventTarget::new_inherited(),
+            tracks: DomRefCell::new(tracks),
+        }
+    }
+
+    pub fn new(global: &GlobalScope, tracks: Vec<Box<BackendMediaStream>>) -> DomRoot<MediaStream> {
+        reflect_dom_object(
+            Box::new(MediaStream::new_inherited(tracks)),
+            global,
+            MediaStreamBinding::Wrap,
+        )
+    }
+
+    pub fn get_tracks(&self) -> Vec<Box<BackendMediaStream>> {
+        // XXXManishearth we have hard ownership constraints here so we actually empty the vec,
+        // ideally we should only have a media stream id here, or servo-media hands
+        // out Arcs
+        let mut tracks = self.tracks.borrow_mut();
+        mem::replace(&mut *tracks, vec![])
+    }
+}
diff --git a/components/script/dom/mod.rs b/components/script/dom/mod.rs
index 4d8e89d274f..a965b6893bc 100644
--- a/components/script/dom/mod.rs
+++ b/components/script/dom/mod.rs
@@ -389,10 +389,12 @@ pub mod imagedata;
 pub mod inputevent;
 pub mod keyboardevent;
 pub mod location;
+pub mod mediadevices;
 pub mod mediaerror;
 pub mod medialist;
 pub mod mediaquerylist;
 pub mod mediaquerylistevent;
+pub mod mediastream;
 pub mod messageevent;
 pub mod mimetype;
 pub mod mimetypearray;
@@ -439,6 +441,10 @@ pub mod radionodelist;
 pub mod range;
 pub mod request;
 pub mod response;
+pub mod rtcicecandidate;
+pub mod rtcpeerconnection;
+pub mod rtcpeerconnectioniceevent;
+pub mod rtcsessiondescription;
 pub mod screen;
 pub mod serviceworker;
 pub mod serviceworkercontainer;
diff --git a/components/script/dom/navigator.rs b/components/script/dom/navigator.rs
index 1d60759f1d7..03899baf97e 100644
--- a/components/script/dom/navigator.rs
+++ b/components/script/dom/navigator.rs
@@ -10,6 +10,7 @@ use crate::dom::bindings::root::{DomRoot, MutNullableDom};
 use crate::dom::bindings::str::DOMString;
 use crate::dom::bluetooth::Bluetooth;
 use crate::dom::gamepadlist::GamepadList;
+use crate::dom::mediadevices::MediaDevices;
 use crate::dom::mimetypearray::MimeTypeArray;
 use crate::dom::navigatorinfo;
 use crate::dom::permissions::Permissions;
@@ -29,6 +30,7 @@ pub struct Navigator {
     mime_types: MutNullableDom<MimeTypeArray>,
     service_worker: MutNullableDom<ServiceWorkerContainer>,
     xr: MutNullableDom<XR>,
+    mediadevices: MutNullableDom<MediaDevices>,
     gamepads: MutNullableDom<GamepadList>,
     permissions: MutNullableDom<Permissions>,
 }
@@ -42,6 +44,7 @@ impl Navigator {
             mime_types: Default::default(),
             service_worker: Default::default(),
             xr: Default::default(),
+            mediadevices: Default::default(),
             gamepads: Default::default(),
             permissions: Default::default(),
         }
@@ -161,4 +164,10 @@ impl NavigatorMethods for Navigator {
     fn Xr(&self) -> DomRoot<XR> {
         self.xr.or_init(|| XR::new(&self.global()))
     }
+
+    /// https://w3c.github.io/mediacapture-main/#dom-navigator-mediadevices
+    fn MediaDevices(&self) -> DomRoot<MediaDevices> {
+        self.mediadevices
+            .or_init(|| MediaDevices::new(&self.global()))
+    }
 }
diff --git a/components/script/dom/rtcicecandidate.rs b/components/script/dom/rtcicecandidate.rs
new file mode 100644
index 00000000000..9eefcd35134
--- /dev/null
+++ b/components/script/dom/rtcicecandidate.rs
@@ -0,0 +1,111 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::codegen::Bindings::RTCIceCandidateBinding::RTCIceCandidateInit;
+use crate::dom::bindings::codegen::Bindings::RTCIceCandidateBinding::{
+    self, RTCIceCandidateMethods,
+};
+use crate::dom::bindings::error::{Error, Fallible};
+use crate::dom::bindings::reflector::reflect_dom_object;
+use crate::dom::bindings::reflector::{DomObject, Reflector};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::str::DOMString;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::window::Window;
+use dom_struct::dom_struct;
+
+#[dom_struct]
+pub struct RTCIceCandidate {
+    reflector: Reflector,
+    candidate: DOMString,
+    sdp_m_id: Option<DOMString>,
+    sdp_m_line_index: Option<u16>,
+    username_fragment: Option<DOMString>,
+}
+
+impl RTCIceCandidate {
+    pub fn new_inherited(
+        candidate: DOMString,
+        sdp_m_id: Option<DOMString>,
+        sdp_m_line_index: Option<u16>,
+        username_fragment: Option<DOMString>,
+    ) -> RTCIceCandidate {
+        RTCIceCandidate {
+            reflector: Reflector::new(),
+            candidate,
+            sdp_m_id,
+            sdp_m_line_index,
+            username_fragment,
+        }
+    }
+
+    pub fn new(
+        global: &GlobalScope,
+        candidate: DOMString,
+        sdp_m_id: Option<DOMString>,
+        sdp_m_line_index: Option<u16>,
+        username_fragment: Option<DOMString>,
+    ) -> DomRoot<RTCIceCandidate> {
+        reflect_dom_object(
+            Box::new(RTCIceCandidate::new_inherited(
+                candidate,
+                sdp_m_id,
+                sdp_m_line_index,
+                username_fragment,
+            )),
+            global,
+            RTCIceCandidateBinding::Wrap,
+        )
+    }
+
+    pub fn Constructor(
+        window: &Window,
+        config: &RTCIceCandidateInit,
+    ) -> Fallible<DomRoot<RTCIceCandidate>> {
+        if config.sdpMid.is_none() && config.sdpMLineIndex.is_none() {
+            return Err(Error::Type(format!(
+                "one of sdpMid and sdpMLineIndex must be set"
+            )));
+        }
+        Ok(RTCIceCandidate::new(
+            &window.global(),
+            config.candidate.clone(),
+            config.sdpMid.clone(),
+            config.sdpMLineIndex,
+            config.usernameFragment.clone(),
+        ))
+    }
+}
+
+impl RTCIceCandidateMethods for RTCIceCandidate {
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcicecandidate-candidate
+    fn Candidate(&self) -> DOMString {
+        self.candidate.clone()
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcicecandidate-sdpmid
+    fn GetSdpMid(&self) -> Option<DOMString> {
+        self.sdp_m_id.clone()
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcicecandidate-sdpmlineindex
+    fn GetSdpMLineIndex(&self) -> Option<u16> {
+        self.sdp_m_line_index.clone()
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcicecandidate-usernamefragment
+    fn GetUsernameFragment(&self) -> Option<DOMString> {
+        self.username_fragment.clone()
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcicecandidate-tojson
+    fn ToJSON(&self) -> RTCIceCandidateInit {
+        RTCIceCandidateInit {
+            candidate: self.candidate.clone(),
+            sdpMid: self.sdp_m_id.clone(),
+            sdpMLineIndex: self.sdp_m_line_index.clone(),
+            usernameFragment: self.username_fragment.clone(),
+        }
+    }
+}
diff --git a/components/script/dom/rtcpeerconnection.rs b/components/script/dom/rtcpeerconnection.rs
new file mode 100644
index 00000000000..619721ca307
--- /dev/null
+++ b/components/script/dom/rtcpeerconnection.rs
@@ -0,0 +1,450 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::cell::DomRefCell;
+use crate::dom::bindings::codegen::Bindings::RTCIceCandidateBinding::RTCIceCandidateInit;
+use crate::dom::bindings::codegen::Bindings::RTCPeerConnectionBinding;
+use crate::dom::bindings::codegen::Bindings::RTCPeerConnectionBinding::RTCPeerConnectionMethods;
+use crate::dom::bindings::codegen::Bindings::RTCPeerConnectionBinding::{
+    RTCAnswerOptions, RTCBundlePolicy, RTCConfiguration, RTCOfferOptions,
+};
+use crate::dom::bindings::codegen::Bindings::RTCSessionDescriptionBinding::{
+    RTCSdpType, RTCSessionDescriptionInit,
+};
+use crate::dom::bindings::codegen::UnionTypes::StringOrStringSequence;
+use crate::dom::bindings::error::Error;
+use crate::dom::bindings::error::Fallible;
+use crate::dom::bindings::inheritance::Castable;
+use crate::dom::bindings::refcounted::{Trusted, TrustedPromise};
+use crate::dom::bindings::reflector::reflect_dom_object;
+use crate::dom::bindings::reflector::DomObject;
+use crate::dom::bindings::root::{DomRoot, MutNullableDom};
+use crate::dom::event::{Event, EventBubbles, EventCancelable};
+use crate::dom::eventtarget::EventTarget;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::mediastream::MediaStream;
+use crate::dom::promise::Promise;
+use crate::dom::rtcicecandidate::RTCIceCandidate;
+use crate::dom::rtcpeerconnectioniceevent::RTCPeerConnectionIceEvent;
+use crate::dom::rtcsessiondescription::RTCSessionDescription;
+use crate::dom::window::Window;
+use crate::task::TaskCanceller;
+use crate::task_source::networking::NetworkingTaskSource;
+use crate::task_source::TaskSource;
+use dom_struct::dom_struct;
+
+use servo_media::webrtc::MediaStream as BackendMediaStream;
+use servo_media::webrtc::{
+    BundlePolicy, IceCandidate, SdpType, SessionDescription, WebRtcController, WebRtcSignaller,
+};
+use servo_media::ServoMedia;
+
+use std::cell::Cell;
+use std::rc::Rc;
+
+#[dom_struct]
+pub struct RTCPeerConnection {
+    eventtarget: EventTarget,
+    #[ignore_malloc_size_of = "defined in servo-media"]
+    controller: DomRefCell<Option<WebRtcController>>,
+    closed: Cell<bool>,
+    /// Helps track state changes between the time createOffer/createAnswer
+    /// is called and resolved
+    offer_answer_generation: Cell<u32>,
+    #[ignore_malloc_size_of = "promises are hard"]
+    offer_promises: DomRefCell<Vec<Rc<Promise>>>,
+    #[ignore_malloc_size_of = "promises are hard"]
+    answer_promises: DomRefCell<Vec<Rc<Promise>>>,
+    local_description: MutNullableDom<RTCSessionDescription>,
+    remote_description: MutNullableDom<RTCSessionDescription>,
+}
+
+struct RTCSignaller {
+    trusted: Trusted<RTCPeerConnection>,
+    task_source: NetworkingTaskSource,
+    canceller: TaskCanceller,
+}
+
+impl WebRtcSignaller for RTCSignaller {
+    fn on_ice_candidate(&self, _: &WebRtcController, candidate: IceCandidate) {
+        let this = self.trusted.clone();
+        let _ = self.task_source.queue_with_canceller(
+            task!(on_ice_candidate: move || {
+                let this = this.root();
+                this.on_ice_candidate(candidate);
+            }),
+            &self.canceller,
+        );
+    }
+
+    fn on_negotiation_needed(&self, _: &WebRtcController) {
+        let this = self.trusted.clone();
+        let _ = self.task_source.queue_with_canceller(
+            task!(on_negotiation_needed: move || {
+                let this = this.root();
+                this.on_negotiation_needed();
+            }),
+            &self.canceller,
+        );
+    }
+
+    fn on_add_stream(&self, _: Box<BackendMediaStream>) {}
+
+    fn close(&self) {
+        // do nothing
+    }
+}
+
+impl RTCPeerConnection {
+    pub fn new_inherited() -> RTCPeerConnection {
+        RTCPeerConnection {
+            eventtarget: EventTarget::new_inherited(),
+            controller: DomRefCell::new(None),
+            closed: Cell::new(false),
+            offer_answer_generation: Cell::new(0),
+            offer_promises: DomRefCell::new(vec![]),
+            answer_promises: DomRefCell::new(vec![]),
+            local_description: Default::default(),
+            remote_description: Default::default(),
+        }
+    }
+
+    pub fn new(global: &GlobalScope, config: &RTCConfiguration) -> DomRoot<RTCPeerConnection> {
+        let this = reflect_dom_object(
+            Box::new(RTCPeerConnection::new_inherited()),
+            global,
+            RTCPeerConnectionBinding::Wrap,
+        );
+        let signaller = this.make_signaller();
+        *this.controller.borrow_mut() = Some(ServoMedia::get().unwrap().create_webrtc(signaller));
+        if let Some(ref servers) = config.iceServers {
+            if let Some(ref server) = servers.get(0) {
+                let server = match server.urls {
+                    StringOrStringSequence::String(ref s) => Some(s.clone()),
+                    StringOrStringSequence::StringSequence(ref s) => s.get(0).cloned(),
+                };
+                if let Some(server) = server {
+                    let policy = match config.bundlePolicy {
+                        RTCBundlePolicy::Balanced => BundlePolicy::Balanced,
+                        RTCBundlePolicy::Max_compat => BundlePolicy::MaxCompat,
+                        RTCBundlePolicy::Max_bundle => BundlePolicy::MaxBundle,
+                    };
+                    this.controller
+                        .borrow()
+                        .as_ref()
+                        .unwrap()
+                        .configure(server.to_string(), policy);
+                }
+            }
+        }
+        this
+    }
+
+    pub fn Constructor(
+        window: &Window,
+        config: &RTCConfiguration,
+    ) -> Fallible<DomRoot<RTCPeerConnection>> {
+        Ok(RTCPeerConnection::new(&window.global(), config))
+    }
+
+    fn make_signaller(&self) -> Box<WebRtcSignaller> {
+        let trusted = Trusted::new(self);
+        let (task_source, canceller) = self
+            .global()
+            .as_window()
+            .task_manager()
+            .networking_task_source_with_canceller();
+        Box::new(RTCSignaller {
+            trusted,
+            task_source,
+            canceller,
+        })
+    }
+
+    fn on_ice_candidate(&self, candidate: IceCandidate) {
+        if self.closed.get() {
+            return;
+        }
+        let candidate = RTCIceCandidate::new(
+            &self.global(),
+            candidate.candidate.into(),
+            None,
+            Some(candidate.sdp_mline_index as u16),
+            None,
+        );
+        let event = RTCPeerConnectionIceEvent::new(
+            &self.global(),
+            atom!("icecandidate"),
+            Some(&candidate),
+            None,
+            true,
+        );
+        event.upcast::<Event>().fire(self.upcast());
+    }
+
+    fn on_negotiation_needed(&self) {
+        if self.closed.get() {
+            return;
+        }
+        let event = Event::new(
+            &self.global(),
+            atom!("negotiationneeded"),
+            EventBubbles::DoesNotBubble,
+            EventCancelable::NotCancelable,
+        );
+        event.upcast::<Event>().fire(self.upcast());
+    }
+
+    fn create_offer(&self) {
+        let generation = self.offer_answer_generation.get();
+        let (task_source, canceller) = self
+            .global()
+            .as_window()
+            .task_manager()
+            .networking_task_source_with_canceller();
+        let this = Trusted::new(self);
+        self.controller.borrow_mut().as_ref().unwrap().create_offer(
+            (move |desc: SessionDescription| {
+                let _ = task_source.queue_with_canceller(
+                    task!(offer_created: move || {
+                        let this = this.root();
+                        if this.offer_answer_generation.get() != generation {
+                            // the state has changed since we last created the offer,
+                            // create a fresh one
+                            this.create_offer();
+                        } else {
+                            let init: RTCSessionDescriptionInit = desc.into();
+                            for promise in this.offer_promises.borrow_mut().drain(..) {
+                                promise.resolve_native(&init);
+                            }
+                        }
+                    }),
+                    &canceller,
+                );
+            })
+            .into(),
+        );
+    }
+
+    fn create_answer(&self) {
+        let generation = self.offer_answer_generation.get();
+        let (task_source, canceller) = self
+            .global()
+            .as_window()
+            .task_manager()
+            .networking_task_source_with_canceller();
+        let this = Trusted::new(self);
+        self.controller
+            .borrow_mut()
+            .as_ref()
+            .unwrap()
+            .create_answer(
+                (move |desc: SessionDescription| {
+                    let _ = task_source.queue_with_canceller(
+                        task!(answer_created: move || {
+                            let this = this.root();
+                            if this.offer_answer_generation.get() != generation {
+                                // the state has changed since we last created the offer,
+                                // create a fresh one
+                                this.create_answer();
+                            } else {
+                                let init: RTCSessionDescriptionInit = desc.into();
+                                for promise in this.answer_promises.borrow_mut().drain(..) {
+                                    promise.resolve_native(&init);
+                                }
+                            }
+                        }),
+                        &canceller,
+                    );
+                })
+                .into(),
+            );
+    }
+}
+
+impl RTCPeerConnectionMethods for RTCPeerConnection {
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-icecandidate
+    event_handler!(icecandidate, GetOnicecandidate, SetOnicecandidate);
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-onnegotiationneeded
+    event_handler!(
+        negotiationneeded,
+        GetOnnegotiationneeded,
+        SetOnnegotiationneeded
+    );
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-addicecandidate
+    fn AddIceCandidate(&self, candidate: &RTCIceCandidateInit) -> Rc<Promise> {
+        let p = Promise::new(&self.global());
+        if candidate.sdpMid.is_none() && candidate.sdpMLineIndex.is_none() {
+            p.reject_error(Error::Type(format!(
+                "one of sdpMid and sdpMLineIndex must be set"
+            )));
+            return p;
+        }
+
+        // XXXManishearth add support for sdpMid
+        if candidate.sdpMLineIndex.is_none() {
+            p.reject_error(Error::Type(format!(
+                "servo only supports sdpMLineIndex right now"
+            )));
+            return p;
+        }
+
+        // XXXManishearth this should be enqueued
+        // https://w3c.github.io/webrtc-pc/#enqueue-an-operation
+
+        self.controller
+            .borrow_mut()
+            .as_ref()
+            .unwrap()
+            .add_ice_candidate(IceCandidate {
+                sdp_mline_index: candidate.sdpMLineIndex.unwrap() as u32,
+                candidate: candidate.candidate.to_string(),
+            });
+
+        // XXXManishearth add_ice_candidate should have a callback
+        p.resolve_native(&());
+        p
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-createoffer
+    fn CreateOffer(&self, _options: &RTCOfferOptions) -> Rc<Promise> {
+        let p = Promise::new(&self.global());
+        if self.closed.get() {
+            p.reject_error(Error::InvalidState);
+            return p;
+        }
+        self.offer_promises.borrow_mut().push(p.clone());
+        self.create_offer();
+        p
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-createoffer
+    fn CreateAnswer(&self, _options: &RTCAnswerOptions) -> Rc<Promise> {
+        let p = Promise::new(&self.global());
+        if self.closed.get() {
+            p.reject_error(Error::InvalidState);
+            return p;
+        }
+        self.answer_promises.borrow_mut().push(p.clone());
+        self.create_answer();
+        p
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-localdescription
+    fn GetLocalDescription(&self) -> Option<DomRoot<RTCSessionDescription>> {
+        self.local_description.get()
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-remotedescription
+    fn GetRemoteDescription(&self) -> Option<DomRoot<RTCSessionDescription>> {
+        self.remote_description.get()
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-setlocaldescription
+    fn SetLocalDescription(&self, desc: &RTCSessionDescriptionInit) -> Rc<Promise> {
+        // XXXManishearth validate the current state
+        let p = Promise::new(&self.global());
+        let this = Trusted::new(self);
+        let desc: SessionDescription = desc.into();
+        let trusted_promise = TrustedPromise::new(p.clone());
+        let (task_source, canceller) = self
+            .global()
+            .as_window()
+            .task_manager()
+            .networking_task_source_with_canceller();
+        self.controller
+            .borrow_mut()
+            .as_ref()
+            .unwrap()
+            .set_local_description(desc.clone(), (move || {
+                    let _ = task_source.queue_with_canceller(
+                        task!(local_description_set: move || {
+                            // XXXManishearth spec actually asks for an intricate
+                            // dance between pending/current local/remote descriptions
+                            let this = this.root();
+                            let desc = desc.into();
+                            let desc = RTCSessionDescription::Constructor(&this.global().as_window(), &desc).unwrap();
+                            this.local_description.set(Some(&desc));
+                            trusted_promise.root().resolve_native(&())
+                        }),
+                        &canceller,
+                    );
+            }).into());
+        p
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-setremotedescription
+    fn SetRemoteDescription(&self, desc: &RTCSessionDescriptionInit) -> Rc<Promise> {
+        // XXXManishearth validate the current state
+        let p = Promise::new(&self.global());
+        let this = Trusted::new(self);
+        let desc: SessionDescription = desc.into();
+        let trusted_promise = TrustedPromise::new(p.clone());
+        let (task_source, canceller) = self
+            .global()
+            .as_window()
+            .task_manager()
+            .networking_task_source_with_canceller();
+        self.controller
+            .borrow_mut()
+            .as_ref()
+            .unwrap()
+            .set_remote_description(desc.clone(), (move || {
+                    let _ = task_source.queue_with_canceller(
+                        task!(remote_description_set: move || {
+                            // XXXManishearth spec actually asks for an intricate
+                            // dance between pending/current local/remote descriptions
+                            let this = this.root();
+                            let desc = desc.into();
+                            let desc = RTCSessionDescription::Constructor(&this.global().as_window(), &desc).unwrap();
+                            this.remote_description.set(Some(&desc));
+                            trusted_promise.root().resolve_native(&())
+                        }),
+                        &canceller,
+                    );
+            }).into());
+        p
+    }
+
+    // https://w3c.github.io/webrtc-pc/#legacy-interface-extensions
+    fn AddStream(&self, stream: &MediaStream) {
+        let mut tracks = stream.get_tracks();
+
+        for track in tracks.drain(..) {
+            self.controller.borrow().as_ref().unwrap().add_stream(track);
+        }
+    }
+}
+
+impl From<SessionDescription> for RTCSessionDescriptionInit {
+    fn from(desc: SessionDescription) -> Self {
+        let type_ = match desc.type_ {
+            SdpType::Answer => RTCSdpType::Answer,
+            SdpType::Offer => RTCSdpType::Offer,
+            SdpType::Pranswer => RTCSdpType::Pranswer,
+            SdpType::Rollback => RTCSdpType::Rollback,
+        };
+        RTCSessionDescriptionInit {
+            type_,
+            sdp: desc.sdp.into(),
+        }
+    }
+}
+
+impl<'a> From<&'a RTCSessionDescriptionInit> for SessionDescription {
+    fn from(desc: &'a RTCSessionDescriptionInit) -> Self {
+        let type_ = match desc.type_ {
+            RTCSdpType::Answer => SdpType::Answer,
+            RTCSdpType::Offer => SdpType::Offer,
+            RTCSdpType::Pranswer => SdpType::Pranswer,
+            RTCSdpType::Rollback => SdpType::Rollback,
+        };
+        SessionDescription {
+            type_,
+            sdp: desc.sdp.to_string(),
+        }
+    }
+}
diff --git a/components/script/dom/rtcpeerconnectioniceevent.rs b/components/script/dom/rtcpeerconnectioniceevent.rs
new file mode 100644
index 00000000000..8293ed48696
--- /dev/null
+++ b/components/script/dom/rtcpeerconnectioniceevent.rs
@@ -0,0 +1,92 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::codegen::Bindings::EventBinding::EventMethods;
+use crate::dom::bindings::codegen::Bindings::RTCPeerConnectionIceEventBinding;
+use crate::dom::bindings::codegen::Bindings::RTCPeerConnectionIceEventBinding::RTCPeerConnectionIceEventInit;
+use crate::dom::bindings::codegen::Bindings::RTCPeerConnectionIceEventBinding::RTCPeerConnectionIceEventMethods;
+use crate::dom::bindings::error::Fallible;
+use crate::dom::bindings::inheritance::Castable;
+use crate::dom::bindings::reflector::reflect_dom_object;
+use crate::dom::bindings::reflector::DomObject;
+use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::bindings::str::DOMString;
+use crate::dom::event::Event;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::rtcicecandidate::RTCIceCandidate;
+use crate::dom::window::Window;
+use dom_struct::dom_struct;
+use servo_atoms::Atom;
+
+#[dom_struct]
+pub struct RTCPeerConnectionIceEvent {
+    event: Event,
+    candidate: Option<Dom<RTCIceCandidate>>,
+    url: Option<DOMString>,
+}
+
+impl RTCPeerConnectionIceEvent {
+    pub fn new_inherited(
+        candidate: Option<&RTCIceCandidate>,
+        url: Option<DOMString>,
+    ) -> RTCPeerConnectionIceEvent {
+        RTCPeerConnectionIceEvent {
+            event: Event::new_inherited(),
+            candidate: candidate.map(Dom::from_ref),
+            url,
+        }
+    }
+
+    pub fn new(
+        global: &GlobalScope,
+        ty: Atom,
+        candidate: Option<&RTCIceCandidate>,
+        url: Option<DOMString>,
+        trusted: bool,
+    ) -> DomRoot<RTCPeerConnectionIceEvent> {
+        let e = reflect_dom_object(
+            Box::new(RTCPeerConnectionIceEvent::new_inherited(candidate, url)),
+            global,
+            RTCPeerConnectionIceEventBinding::Wrap,
+        );
+        let evt = e.upcast::<Event>();
+        evt.init_event(ty, false, false); // XXXManishearth bubbles/cancelable?
+        evt.set_trusted(trusted);
+        e
+    }
+
+    pub fn Constructor(
+        window: &Window,
+        ty: DOMString,
+        init: &RTCPeerConnectionIceEventInit,
+    ) -> Fallible<DomRoot<RTCPeerConnectionIceEvent>> {
+        Ok(RTCPeerConnectionIceEvent::new(
+            &window.global(),
+            ty.into(),
+            init.candidate
+                .as_ref()
+                .and_then(|x| x.as_ref())
+                .map(|x| &**x),
+            init.url.as_ref().and_then(|x| x.clone()),
+            false,
+        ))
+    }
+}
+
+impl RTCPeerConnectionIceEventMethods for RTCPeerConnectionIceEvent {
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnectioniceevent-candidate
+    fn GetCandidate(&self) -> Option<DomRoot<RTCIceCandidate>> {
+        self.candidate.as_ref().map(|x| DomRoot::from_ref(&**x))
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnectioniceevent-url
+    fn GetUrl(&self) -> Option<DOMString> {
+        self.url.clone()
+    }
+
+    /// https://dom.spec.whatwg.org/#dom-event-istrusted
+    fn IsTrusted(&self) -> bool {
+        self.event.IsTrusted()
+    }
+}
diff --git a/components/script/dom/rtcsessiondescription.rs b/components/script/dom/rtcsessiondescription.rs
new file mode 100644
index 00000000000..27ab4ca3b41
--- /dev/null
+++ b/components/script/dom/rtcsessiondescription.rs
@@ -0,0 +1,85 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::codegen::Bindings::RTCSessionDescriptionBinding;
+use crate::dom::bindings::codegen::Bindings::RTCSessionDescriptionBinding::RTCSessionDescriptionMethods;
+use crate::dom::bindings::codegen::Bindings::RTCSessionDescriptionBinding::{
+    RTCSdpType, RTCSessionDescriptionInit,
+};
+use crate::dom::bindings::error::Fallible;
+use crate::dom::bindings::reflector::reflect_dom_object;
+use crate::dom::bindings::reflector::{DomObject, Reflector};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::str::DOMString;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::window::Window;
+use dom_struct::dom_struct;
+use js::conversions::ToJSValConvertible;
+use js::jsapi::{JSContext, JSObject};
+use js::jsval::UndefinedValue;
+use std::ptr::NonNull;
+
+#[dom_struct]
+pub struct RTCSessionDescription {
+    reflector: Reflector,
+    ty: RTCSdpType,
+    sdp: DOMString,
+}
+
+impl RTCSessionDescription {
+    pub fn new_inherited(ty: RTCSdpType, sdp: DOMString) -> RTCSessionDescription {
+        RTCSessionDescription {
+            reflector: Reflector::new(),
+            ty,
+            sdp,
+        }
+    }
+
+    pub fn new(
+        global: &GlobalScope,
+        ty: RTCSdpType,
+        sdp: DOMString,
+    ) -> DomRoot<RTCSessionDescription> {
+        reflect_dom_object(
+            Box::new(RTCSessionDescription::new_inherited(ty, sdp)),
+            global,
+            RTCSessionDescriptionBinding::Wrap,
+        )
+    }
+
+    pub fn Constructor(
+        window: &Window,
+        config: &RTCSessionDescriptionInit,
+    ) -> Fallible<DomRoot<RTCSessionDescription>> {
+        Ok(RTCSessionDescription::new(
+            &window.global(),
+            config.type_,
+            config.sdp.clone(),
+        ))
+    }
+}
+
+impl RTCSessionDescriptionMethods for RTCSessionDescription {
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcsessiondescription-type
+    fn Type(&self) -> RTCSdpType {
+        self.ty
+    }
+
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcsessiondescription-sdp
+    fn Sdp(&self) -> DOMString {
+        self.sdp.clone()
+    }
+
+    #[allow(unsafe_code)]
+    /// https://w3c.github.io/webrtc-pc/#dom-rtcsessiondescription-tojson
+    unsafe fn ToJSON(&self, cx: *mut JSContext) -> NonNull<JSObject> {
+        let init = RTCSessionDescriptionInit {
+            type_: self.ty,
+            sdp: self.sdp.clone(),
+        };
+        rooted!(in(cx) let mut jsval = UndefinedValue());
+        init.to_jsval(cx, jsval.handle_mut());
+        NonNull::new(jsval.to_object()).unwrap()
+    }
+}
diff --git a/components/script/dom/webidls/MediaDevices.webidl b/components/script/dom/webidls/MediaDevices.webidl
new file mode 100644
index 00000000000..7fa30e0b916
--- /dev/null
+++ b/components/script/dom/webidls/MediaDevices.webidl
@@ -0,0 +1,88 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/mediacapture-main/#dom-mediadevices
+
+[Exposed=Window,
+SecureContext, Pref="dom.webrtc.enabled"]
+interface MediaDevices : EventTarget {
+    //                attribute EventHandler ondevicechange;
+    // Promise<sequence<MediaDeviceInfo>> enumerateDevices();
+};
+
+partial interface Navigator {
+    // [SameObject, SecureContext]
+    [Pref="dom.webrtc.enabled"] readonly        attribute MediaDevices mediaDevices;
+};
+
+partial interface MediaDevices {
+    // MediaTrackSupportedConstraints getSupportedConstraints();
+    Promise<MediaStream> getUserMedia(optional MediaStreamConstraints constraints);
+};
+
+
+dictionary MediaStreamConstraints {
+    //         (boolean or MediaTrackConstraints) video = false;
+    //         (boolean or MediaTrackConstraints) audio = false;
+                boolean video = false;
+                boolean audio = false;
+};
+
+// dictionary DoubleRange {
+//              double max;
+//              double min;
+// };
+
+// dictionary ConstrainDoubleRange : DoubleRange {
+//              double exact;
+//              double ideal;
+// };
+
+// dictionary ULongRange {
+//              [Clamp] unsigned long max;
+//              [Clamp] unsigned long min;
+// };
+
+// dictionary ConstrainULongRange : ULongRange {
+//              [Clamp] unsigned long exact;
+//              [Clamp] unsigned long ideal;
+// };
+
+// dictionary ConstrainBooleanParameters {
+//              boolean exact;
+//              boolean ideal;
+// };
+
+// dictionary ConstrainDOMStringParameters {
+//              (DOMString or sequence<DOMString>) exact;
+//              (DOMString or sequence<DOMString>) ideal;
+// };
+
+// dictionary MediaTrackConstraints : MediaTrackConstraintSet {
+//              sequence<MediaTrackConstraintSet> advanced;
+// };
+
+// typedef ([Clamp] unsigned long or ConstrainULongRange) ConstrainULong;
+// typedef (double or ConstrainDoubleRange) ConstrainDouble;
+// typedef (boolean or ConstrainBooleanParameters) ConstrainBoolean;
+// typedef (DOMString or sequence<DOMString> or ConstrainDOMStringParameters) ConstrainDOMString;
+
+// dictionary MediaTrackConstraintSet {
+//              ConstrainULong width;
+//              ConstrainULong height;
+//              ConstrainDouble aspectRatio;
+//              ConstrainDouble frameRate;
+//              ConstrainDOMString facingMode;
+//              ConstrainDOMString resizeMode;
+//              ConstrainDouble volume;
+//              ConstrainULong sampleRate;
+//              ConstrainULong sampleSize;
+//              ConstrainBoolean echoCancellation;
+//              ConstrainBoolean autoGainControl;
+//              ConstrainBoolean noiseSuppression;
+//              ConstrainDouble latency;
+//              ConstrainULong channelCount;
+//              ConstrainDOMString deviceId;
+//              ConstrainDOMString groupId;
+// };
diff --git a/components/script/dom/webidls/MediaStream.webidl b/components/script/dom/webidls/MediaStream.webidl
new file mode 100644
index 00000000000..0257e3c6061
--- /dev/null
+++ b/components/script/dom/webidls/MediaStream.webidl
@@ -0,0 +1,24 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/mediacapture-main/#dom-mediastream
+
+// [Exposed=Window,
+//  Constructor,
+//  Constructor(MediaStream stream),
+//  Constructor(sequence<MediaStreamTrack> tracks)]
+[Exposed=Window, Pref="dom.webrtc.enabled"]
+interface MediaStream : EventTarget {
+    // readonly        attribute DOMString id;
+    // sequence<MediaStreamTrack> getAudioTracks();
+    // sequence<MediaStreamTrack> getVideoTracks();
+    // sequence<MediaStreamTrack> getTracks();
+    // MediaStreamTrack? getTrackById(DOMString trackId);
+    // void addTrack(MediaStreamTrack track);
+    // void removeTrack(MediaStreamTrack track);
+    // MediaStream clone();
+    // readonly        attribute boolean active;
+    //                 attribute EventHandler onaddtrack;
+    //                 attribute EventHandler onremovetrack;
+};
diff --git a/components/script/dom/webidls/RTCIceCandidate.webidl b/components/script/dom/webidls/RTCIceCandidate.webidl
new file mode 100644
index 00000000000..538805c88db
--- /dev/null
+++ b/components/script/dom/webidls/RTCIceCandidate.webidl
@@ -0,0 +1,33 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/webrtc-pc/#rtcicecandidate-interface
+
+
+[Constructor(optional RTCIceCandidateInit candidateInitDict),
+ Exposed=Window, Pref="dom.webrtc.enabled"]
+interface RTCIceCandidate {
+    readonly attribute DOMString               candidate;
+    readonly attribute DOMString?              sdpMid;
+    readonly attribute unsigned short?         sdpMLineIndex;
+    // readonly attribute DOMString?              foundation;
+    // readonly attribute RTCIceComponent?        component;
+    // readonly attribute unsigned long?          priority;
+    // readonly attribute DOMString?              address;
+    // readonly attribute RTCIceProtocol?         protocol;
+    // readonly attribute unsigned short?         port;
+    // readonly attribute RTCIceCandidateType?    type;
+    // readonly attribute RTCIceTcpCandidateType? tcpType;
+    // readonly attribute DOMString?              relatedAddress;
+    // readonly attribute unsigned short?         relatedPort;
+    readonly attribute DOMString?              usernameFragment;
+    RTCIceCandidateInit toJSON();
+};
+
+dictionary RTCIceCandidateInit {
+    DOMString       candidate = "";
+    DOMString?      sdpMid = null;
+    unsigned short? sdpMLineIndex = null;
+    DOMString       usernameFragment;
+};
diff --git a/components/script/dom/webidls/RTCPeerConnection.webidl b/components/script/dom/webidls/RTCPeerConnection.webidl
new file mode 100644
index 00000000000..c79dba097bf
--- /dev/null
+++ b/components/script/dom/webidls/RTCPeerConnection.webidl
@@ -0,0 +1,91 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/webrtc-pc/#interface-definition
+
+[Constructor(optional RTCConfiguration configuration),
+ Exposed=Window, Pref="dom.webrtc.enabled"]
+interface RTCPeerConnection : EventTarget {
+    Promise<RTCSessionDescriptionInit> createOffer(optional RTCOfferOptions options);
+    Promise<RTCSessionDescriptionInit> createAnswer(optional RTCAnswerOptions options);
+    Promise<void>                      setLocalDescription(RTCSessionDescriptionInit description);
+    readonly attribute RTCSessionDescription? localDescription;
+    // readonly attribute RTCSessionDescription? currentLocalDescription;
+    // readonly attribute RTCSessionDescription? pendingLocalDescription;
+    Promise<void>                      setRemoteDescription(RTCSessionDescriptionInit description);
+    readonly attribute RTCSessionDescription? remoteDescription;
+    // readonly attribute RTCSessionDescription? currentRemoteDescription;
+    // readonly attribute RTCSessionDescription? pendingRemoteDescription;
+    Promise<void>                      addIceCandidate(optional RTCIceCandidateInit candidate);
+    // readonly attribute RTCSignalingState      signalingState;
+    // readonly attribute RTCIceGatheringState   iceGatheringState;
+    // readonly attribute RTCIceConnectionState  iceConnectionState;
+    // readonly attribute RTCPeerConnectionState connectionState;
+    // readonly attribute boolean?               canTrickleIceCandidates;
+    // static sequence<RTCIceServer>      getDefaultIceServers();
+    // RTCConfiguration                   getConfiguration();
+    // void                               setConfiguration(RTCConfiguration configuration);
+    // void                               close();
+             attribute EventHandler           onnegotiationneeded;
+             attribute EventHandler           onicecandidate;
+    //          attribute EventHandler           onicecandidateerror;
+    //          attribute EventHandler           onsignalingstatechange;
+    //          attribute EventHandler           oniceconnectionstatechange;
+    //          attribute EventHandler           onicegatheringstatechange;
+    //          attribute EventHandler           onconnectionstatechange;
+
+    // removed from spec, but still shipped by browsers
+    void addStream (MediaStream stream);
+};
+
+dictionary RTCConfiguration {
+    sequence<RTCIceServer>   iceServers;
+    RTCIceTransportPolicy    iceTransportPolicy = "all";
+    RTCBundlePolicy          bundlePolicy = "balanced";
+    RTCRtcpMuxPolicy         rtcpMuxPolicy = "require";
+    DOMString                peerIdentity;
+    // sequence<RTCCertificate> certificates;
+    [EnforceRange]
+    octet                    iceCandidatePoolSize = 0;
+};
+
+enum RTCIceTransportPolicy {
+    "relay",
+    "all"
+};
+
+enum RTCBundlePolicy {
+    "balanced",
+    "max-compat",
+    "max-bundle"
+};
+
+enum RTCRtcpMuxPolicy {
+    // At risk due to lack of implementers' interest.
+    "negotiate",
+    "require"
+};
+
+dictionary RTCIceServer {
+    required (DOMString or sequence<DOMString>) urls;
+             DOMString                          username;
+             DOMString /*(DOMString or RTCOAuthCredential)*/  credential;
+             RTCIceCredentialType               credentialType = "password";
+};
+
+enum RTCIceCredentialType {
+    "password",
+    "oauth"
+};
+
+dictionary RTCOfferAnswerOptions {
+    boolean voiceActivityDetection = true;
+};
+
+dictionary RTCOfferOptions : RTCOfferAnswerOptions {
+    boolean iceRestart = false;
+};
+
+dictionary RTCAnswerOptions : RTCOfferAnswerOptions {
+};
diff --git a/components/script/dom/webidls/RTCPeerConnectionIceEvent.webidl b/components/script/dom/webidls/RTCPeerConnectionIceEvent.webidl
new file mode 100644
index 00000000000..26a3919b21f
--- /dev/null
+++ b/components/script/dom/webidls/RTCPeerConnectionIceEvent.webidl
@@ -0,0 +1,17 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/webrtc-pc/#rtcpeerconnectioniceevent
+
+[Constructor(DOMString type, optional RTCPeerConnectionIceEventInit eventInitDict),
+ Exposed=Window, Pref="dom.webrtc.enabled"]
+interface RTCPeerConnectionIceEvent : Event {
+    readonly attribute RTCIceCandidate? candidate;
+    readonly attribute DOMString?       url;
+};
+
+dictionary RTCPeerConnectionIceEventInit : EventInit {
+    RTCIceCandidate? candidate;
+    DOMString?       url;
+};
diff --git a/components/script/dom/webidls/RTCSessionDescription.webidl b/components/script/dom/webidls/RTCSessionDescription.webidl
new file mode 100644
index 00000000000..90ba45f1c44
--- /dev/null
+++ b/components/script/dom/webidls/RTCSessionDescription.webidl
@@ -0,0 +1,25 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/webrtc-pc/#rtcsessiondescription-class
+
+[Constructor(RTCSessionDescriptionInit descriptionInitDict),
+ Exposed=Window, Pref="dom.webrtc.enabled"]
+interface RTCSessionDescription {
+    readonly attribute RTCSdpType type;
+    readonly attribute DOMString  sdp;
+    [Default] object toJSON();
+};
+
+dictionary RTCSessionDescriptionInit {
+    required RTCSdpType type;
+             DOMString  sdp = "";
+};
+
+enum RTCSdpType {
+    "offer",
+    "pranswer",
+    "answer",
+    "rollback"
+};
diff --git a/python/servo/build_commands.py b/python/servo/build_commands.py
index a3a463d5931..0fea67f9a70 100644
--- a/python/servo/build_commands.py
+++ b/python/servo/build_commands.py
@@ -446,7 +446,7 @@ class MachCommands(CommandBase):
             # Build the name of the package containing all GStreamer dependencies
             # according to the build target.
             gst_lib = "gst-build-{}".format(self.config["android"]["lib"])
-            gst_lib_zip = "gstreamer-{}-1.14.3-20181105-103937.zip".format(self.config["android"]["lib"])
+            gst_lib_zip = "gstreamer-{}-1.14.3-20190131-153818.zip".format(self.config["android"]["lib"])
             gst_dir = os.path.join(target_path, "gstreamer")
             gst_lib_path = os.path.join(gst_dir, gst_lib)
             pkg_config_path = os.path.join(gst_lib_path, "pkgconfig")
diff --git a/resources/prefs.json b/resources/prefs.json
index cc712caa5f1..7adcf75c0ea 100644
--- a/resources/prefs.json
+++ b/resources/prefs.json
@@ -18,6 +18,7 @@
   "dom.testbinding.enabled": false,
   "dom.webgl.dom_to_texture.enabled": false,
   "dom.webgl2.enabled": false,
+  "dom.webrtc.enabled": false,
   "dom.webvr.enabled": false,
   "dom.webvr.event_polling_interval": 500,
   "gfx.subpixel-text-antialiasing.enabled": true,