Trace where timers were scheduled in Blink

Source/core/events/GenericEventQueue.cpp

 /*
  * Copyright (C) 2012 Victor Carbune (victor@rosedu.org)
  *
  * 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 42 matching lines @@
     if (m_isClosed)
         return false;
 
     if (event->target() == m_owner)
         event->setTarget(nullptr);
 
     TRACE_EVENT_ASYNC_BEGIN1("event", "GenericEventQueue:enqueueEvent", event.get(), "type", event->type().ascii());
     m_pendingEvents.append(event);
 
     if (!m_timer.isActive())
-        m_timer.startOneShot(0);
+        m_timer.startOneShot(0, FROM_HERE);
 
     return true;
 }
 
 bool GenericEventQueue::cancelEvent(Event* event)
 {
     bool found = m_pendingEvents.contains(event);
 
     if (found) {
         m_pendingEvents.remove(m_pendingEvents.find(event));
@@ skipping 41 matching lines @@
     }
     m_pendingEvents.clear();
 }
 
 bool GenericEventQueue::hasPendingEvents() const
 {
     return m_pendingEvents.size();
 }
 
 }