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, 8 insertions, 4 deletions

diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index 37f65f774b2..327e766e7fa 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -50,7 +50,7 @@ use dom::workletglobalscope::WorkletGlobalScopeType;
 use dom_struct::dom_struct;
 use euclid::{Point2D, Vector2D, Rect, Size2D, TypedPoint2D, TypedScale, TypedSize2D};
 use fetch;
-use ipc_channel::ipc::{self, IpcSender};
+use ipc_channel::ipc::IpcSender;
 use ipc_channel::router::ROUTER;
 use js::jsapi::{HandleValue, JSAutoCompartment, JSContext};
 use js::jsapi::{JS_GC, JS_GetRuntime};
@@ -63,6 +63,7 @@ use net_traits::image_cache::{ImageCache, ImageResponder, ImageResponse};
 use net_traits::image_cache::{PendingImageId, PendingImageResponse};
 use net_traits::storage_thread::StorageType;
 use num_traits::ToPrimitive;
+use profile_traits::ipc as ProfiledIpc;
 use profile_traits::mem::ProfilerChan as MemProfilerChan;
 use profile_traits::time::ProfilerChan as TimeProfilerChan;
 use script_layout_interface::{TrustedNodeAddress, PendingImageState};
@@ -540,7 +541,7 @@ impl WindowMethods for Window {
             stderr.flush().unwrap();
         }
 
-        let (sender, receiver) = ipc::channel().unwrap();
+        let (sender, receiver) = ProfiledIpc::channel(self.global().time_profiler_chan().clone()).unwrap();
         self.send_to_constellation(ScriptMsg::Alert(s.to_string(), sender));
 
         let should_display_alert_dialog = receiver.recv().unwrap();
@@ -1180,7 +1181,9 @@ impl Window {
     }
 
     fn client_window(&self) -> (TypedSize2D<u32, CSSPixel>, TypedPoint2D<i32, CSSPixel>) {
-        let (send, recv) = ipc::channel::<(DeviceUintSize, DeviceIntPoint)>().unwrap();
+        let timer_profile_chan = self.global().time_profiler_chan().clone();
+        let (send, recv) =
+            ProfiledIpc::channel::<(DeviceUintSize, DeviceIntPoint)>(timer_profile_chan).unwrap();
         self.send_to_constellation(ScriptMsg::GetClientWindow(send));
         let (size, point) = recv.recv().unwrap_or((TypedSize2D::zero(), TypedPoint2D::zero()));
         let dpr = self.device_pixel_ratio();
@@ -1300,7 +1303,8 @@ impl Window {
             let mut images = self.pending_layout_images.borrow_mut();
             let nodes = images.entry(id).or_insert(vec![]);
             if nodes.iter().find(|n| &***n as *const _ == &*node as *const _).is_none() {
-                let (responder, responder_listener) = ipc::channel().unwrap();
+                let (responder, responder_listener) =
+                    ProfiledIpc::channel(self.global().time_profiler_chan().clone()).unwrap();
                 let pipeline = self.upcast::<GlobalScope>().pipeline_id();
                 let image_cache_chan = self.image_cache_chan.clone();
                 ROUTER.add_route(responder_listener.to_opaque(), Box::new(move |message| {