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, 2 insertions, 2 deletions

diff --git a/components/script/dom/url.rs b/components/script/dom/url.rs
index f605e717bf8..0fef2e5bb5f 100644
--- a/components/script/dom/url.rs
+++ b/components/script/dom/url.rs
@@ -13,10 +13,10 @@ use dom::globalscope::GlobalScope;
 use dom::urlhelper::UrlHelper;
 use dom::urlsearchparams::URLSearchParams;
 use dom_struct::dom_struct;
-use ipc_channel::ipc;
 use net_traits::{CoreResourceMsg, IpcSend};
 use net_traits::blob_url_store::{get_blob_origin, parse_blob_url};
 use net_traits::filemanager_thread::FileManagerThreadMsg;
+use profile_traits::ipc;
 use servo_url::ServoUrl;
 use std::default::Default;
 use uuid::Uuid;
@@ -118,7 +118,7 @@ impl URL {
         if let Ok(url) = ServoUrl::parse(&url) {
              if let Ok((id, _)) = parse_blob_url(&url) {
                 let resource_threads = global.resource_threads();
-                let (tx, rx) = ipc::channel().unwrap();
+                let (tx, rx) = ipc::channel(global.time_profiler_chan().clone()).unwrap();
                 let msg = FileManagerThreadMsg::RevokeBlobURL(id, origin, tx);
                 let _ = resource_threads.send(CoreResourceMsg::ToFileManager(msg));