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, 4 insertions, 3 deletions

diff --git a/components/script/dom/bluetoothdevice.rs b/components/script/dom/bluetoothdevice.rs
index 6fcdf40f3ff..b8e08618960 100644
--- a/components/script/dom/bluetoothdevice.rs
+++ b/components/script/dom/bluetoothdevice.rs
@@ -24,7 +24,8 @@ use dom::eventtarget::EventTarget;
 use dom::globalscope::GlobalScope;
 use dom::promise::Promise;
 use dom_struct::dom_struct;
-use ipc_channel::ipc::{self, IpcSender};
+use ipc_channel::ipc::IpcSender;
+use profile_traits::ipc;
 use std::cell::Cell;
 use std::collections::HashMap;
 use std::rc::Rc;
@@ -129,7 +130,7 @@ impl BluetoothDevice {
     }
 
     pub fn is_represented_device_null(&self) -> bool {
-        let (sender, receiver) = ipc::channel().unwrap();
+        let (sender, receiver) = ipc::channel(self.global().time_profiler_chan().clone()).unwrap();
         self.get_bluetooth_thread().send(
             BluetoothRequest::IsRepresentedDeviceNull(self.Id().to_string(), sender)).unwrap();
         receiver.recv().unwrap()
@@ -204,7 +205,7 @@ impl BluetoothDevice {
         }
 
         // Step 3.
-        let (sender, receiver) = ipc::channel().unwrap();
+        let (sender, receiver) = ipc::channel(self.global().time_profiler_chan().clone()).unwrap();
         self.get_bluetooth_thread().send(
             BluetoothRequest::GATTServerDisconnect(String::from(self.Id()), sender)).unwrap();
         receiver.recv().unwrap().map_err(Error::from)