Trace where timers were scheduled in Blink

Source/core/frame/DOMTimer.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 76 matching lines @@
     , m_action(action)
 {
     ASSERT(timeoutID > 0);
     if (shouldForwardUserGesture(interval, m_nestingLevel))
         m_userGestureToken = UserGestureIndicator::currentToken();
 
     double intervalMilliseconds = max(oneMillisecond, interval * oneMillisecond);
     if (intervalMilliseconds < minimumInterval && m_nestingLevel >= maxTimerNestingLevel)
         intervalMilliseconds = minimumInterval;
     if (singleShot)
-        startOneShot(intervalMilliseconds);
+        startOneShot(intervalMilliseconds, FROM_HERE);
     else
-        startRepeating(intervalMilliseconds);
+        startRepeating(intervalMilliseconds, FROM_HERE);
 }
 
 DOMTimer::~DOMTimer()
 {
 }
 
 int DOMTimer::timeoutID() const
 {
     return m_timeoutID;
 }
@@ skipping 81 matching lines @@
         if (fireTime - alignedTimeRoundedDown < minimumInterval)
             return alignedTimeRoundedDown;
 
         return alignedTimeRoundedUp;
     }
 
     return fireTime;
 }
 
 } // namespace WebCore