Auto merge of #20132 - nakul02:issue_19223, r=jdm

Profiler for blocked IpcReceiver::recv()

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Implements feature #19223

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #19223 (github issue number if applicable).

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- [x] There are tests for these changes

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WIP.
@jdm - this is the new profiler : "Blocked at IPC Receive"
Should I dig through all the calls to `ipc::channel` and replace them with this profiled `IpcReceiver`?

![screenshot from 2018-02-27 01-35-37](https://user-images.githubusercontent.com/5394361/36721061-b46edea4-1b5e-11e8-91d6-7faba742f237.png)

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1 files changed, 3 insertions, 2 deletions

diff --git a/components/script/dom/paintworkletglobalscope.rs b/components/script/dom/paintworkletglobalscope.rs
index eda9021e64c..3665b4af089 100644
--- a/components/script/dom/paintworkletglobalscope.rs
+++ b/components/script/dom/paintworkletglobalscope.rs
@@ -26,7 +26,6 @@ use dom::workletglobalscope::WorkletTask;
 use dom_struct::dom_struct;
 use euclid::TypedScale;
 use euclid::TypedSize2D;
-use ipc_channel::ipc;
 use js::jsapi::Call;
 use js::jsapi::Construct1;
 use js::jsapi::HandleValue;
@@ -46,6 +45,7 @@ use js::rust::Runtime;
 use msg::constellation_msg::PipelineId;
 use net_traits::image::base::PixelFormat;
 use net_traits::image_cache::ImageCache;
+use profile_traits::ipc;
 use script_traits::{DrawAPaintImageResult, PaintWorkletError};
 use script_traits::Painter;
 use servo_atoms::Atom;
@@ -296,7 +296,8 @@ impl PaintWorkletGlobalScope {
             return self.invalid_image(size_in_dpx, missing_image_urls);
         }
 
-        let (sender, receiver) = ipc::channel().expect("IPC channel creation.");
+        let (sender, receiver) =
+            ipc::channel(self.global().time_profiler_chan().clone()).expect("IPC channel creation.");
         rendering_context.send_data(sender);
         let image_key = match receiver.recv() {
             Ok(data) => Some(data.image_key),