Trace where timers were scheduled in Blink

Source/core/accessibility/AXObjectCache.cpp

 /*
  * Copyright (C) 2008, 2009, 2010 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
@@ skipping 749 matching lines @@
 
     if (!object && document)
         object = get(document->renderer());
 
     if (!object)
         return;
 
     if (postType == PostAsynchronously) {
         m_notificationsToPost.append(std::make_pair(object, notification));
         if (!m_notificationPostTimer.isActive())
-            m_notificationPostTimer.startOneShot(0);
+            m_notificationPostTimer.startOneShot(0, FROM_HERE);
     } else {
         postPlatformNotification(object, notification);
     }
 }
 
 void AXObjectCache::checkedStateChanged(Node* node)
 {
     postNotification(node, AXObjectCache::AXCheckedStateChanged, true);
 }
 
@@ skipping 253 matching lines @@
 {
     postPlatformNotification(getOrCreate(scrollView), AXScrollPositionChanged);
 }
 
 void AXObjectCache::handleScrollPositionChanged(RenderObject* renderObject)
 {
     postPlatformNotification(getOrCreate(renderObject), AXScrollPositionChanged);
 }
 
 } // namespace WebCore