Bug 1462784 - Annotate idle stacks in the chromium event loop. r=froydnj

MozReview-Commit-ID: Ac8H02GKnmV

--HG--
extra : rebase_source : 3bbf0398b2a2152a9000d51f04688436832f81e1

ipc/chromium/src/base/message_pump_default.cc

@@ -21,6 +21,8 @@ MessagePumpDefault::MessagePumpDefault()
 }
 
 void MessagePumpDefault::Run(Delegate* delegate) {
+  AUTO_PROFILER_LABEL("MessagePumpDefault::Run", OTHER);
+
   DCHECK(keep_running_) << "Quit must have been called outside of Run!";
 
   const MessageLoop* const loop = MessageLoop::current();
@@ -55,7 +57,7 @@ void MessagePumpDefault::Run(Delegate* delegate) {
 
     if (delayed_work_time_.is_null()) {
       hangMonitor.NotifyWait();
-      AUTO_PROFILER_LABEL("MessagePumpDefault::Run:Wait", OTHER);
+      AUTO_PROFILER_LABEL("MessagePumpDefault::Run:Wait", IDLE);
       {
         AUTO_PROFILER_THREAD_SLEEP;
         event_.Wait();
@@ -64,7 +66,7 @@ void MessagePumpDefault::Run(Delegate* delegate) {
       TimeDelta delay = delayed_work_time_ - TimeTicks::Now();
       if (delay > TimeDelta()) {
         hangMonitor.NotifyWait();
-        AUTO_PROFILER_LABEL("MessagePumpDefault::Run:Wait", OTHER);
+        AUTO_PROFILER_LABEL("MessagePumpDefault::Run:Wait", IDLE);
         {
           AUTO_PROFILER_THREAD_SLEEP;
           event_.TimedWait(delay);