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/document.rs b/components/script/dom/document.rs
index 6895a71fddb..b1cee370bfe 100644
--- a/components/script/dom/document.rs
+++ b/components/script/dom/document.rs
@@ -93,7 +93,7 @@ use fetch::FetchCanceller;
 use html5ever::{LocalName, Namespace, QualName};
 use hyper::header::{Header, SetCookie};
 use hyper_serde::Serde;
-use ipc_channel::ipc::{self, IpcSender};
+use ipc_channel::ipc::IpcSender;
 use js::jsapi::{JSContext, JSObject, JSRuntime};
 use js::jsapi::JS_GetRuntime;
 use metrics::{InteractiveFlag, InteractiveMetrics, InteractiveWindow, ProfilerMetadataFactory, ProgressiveWebMetric};
@@ -106,6 +106,7 @@ use net_traits::pub_domains::is_pub_domain;
 use net_traits::request::RequestInit;
 use net_traits::response::HttpsState;
 use num_traits::ToPrimitive;
+use profile_traits::ipc;
 use profile_traits::time::{TimerMetadata, TimerMetadataFrameType, TimerMetadataReflowType};
 use ref_slice::ref_slice;
 use script_layout_interface::message::{Msg, NodesFromPointQueryType, ReflowGoal};
@@ -3448,7 +3449,7 @@ impl DocumentMethods for Document {
         }
 
         let url = self.url();
-        let (tx, rx) = ipc::channel().unwrap();
+        let (tx, rx) = ipc::channel(self.global().time_profiler_chan().clone()).unwrap();
         let _ = self.window
             .upcast::<GlobalScope>()
             .resource_threads()