Adding instrumentation to locate the source of jankiness.

base/process/kill_win.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/process/kill.h"
 
 #include <io.h>
 #include <windows.h>
 
 #include "base/bind.h"
@@ skipping 55 matching lines @@
 }
 
 void TimerExpiredTask::TimedOut() {
   if (process_.IsValid())
     KillProcess();
 }
 
 void TimerExpiredTask::OnObjectSignaled(HANDLE object) {
   // TODO(vadimt): Remove ScopedTracker below once crbug.com/418183 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION("TimerExpiredTask_OnObjectSignaled"));
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "418183 TimerExpiredTask::OnObjectSignaled"));
 
   process_.Close();
 }
 
 void TimerExpiredTask::KillProcess() {
   // Stop watching the process handle since we're killing it.
   watcher_.StopWatching();
 
   // OK, time to get frisky.  We don't actually care when the process
   // terminates.  We just care that it eventually terminates, and that's what
@@ skipping 161 matching lines @@
   }
 
   MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&TimerExpiredTask::TimedOut,
                  base::Owned(new TimerExpiredTask(process.Pass()))),
       base::TimeDelta::FromMilliseconds(kWaitInterval));
 }
 
 }  // namespace base