Trace where timers were scheduled in Blink

Source/core/testing/MockPagePopupDriver.cpp

 /*
  * Copyright (C) 2012 Google 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 68 matching lines @@
     return adoptRef(new MockPagePopup(client, originBoundsInRootView, mainFrame));
 }
 
 void MockPagePopup::closeLater()
 {
     ref();
     m_popupClient->didClosePopup();
     m_popupClient = 0;
     // This can be called in detach(), and we should not change DOM structure
     // during detach().
-    m_closeTimer.startOneShot(0);
+    m_closeTimer.startOneShot(0, FROM_HERE);
 }
 
 void MockPagePopup::close(Timer<MockPagePopup>*)
 {
     deref();
 }
 
 MockPagePopup::~MockPagePopup()
 {
     if (m_iframe && m_iframe->parentNode())
@@ skipping 30 matching lines @@
 {
     if (!popup || popup != m_mockPagePopup.get())
         return;
     m_mockPagePopup->closeLater();
     m_mockPagePopup.clear();
     m_pagePopupController->clearPagePopupClient();
     m_pagePopupController.clear();
 }
 
 }