Trace where timers were scheduled in Blink

Source/web/WebHelperPluginImpl.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 81 matching lines @@
     delete this;
 }
 
 void WebHelperPluginImpl::destroy()
 {
     // Defer deletion so we don't do too much work when called via stopActiveDOMObjects().
     // FIXME: It's not clear why we still need this. The original code held a Page and a
     // WebFrame, and destroying it would cause JavaScript triggered by frame detach to run,
     // which isn't allowed inside stopActiveDOMObjects(). Removing this causes one Chrome test
     // to fail with a timeout.
-    m_destructionTimer.startOneShot(0);
+    m_destructionTimer.startOneShot(0, FROM_HERE);
 }
 
 WebPlugin* WebHelperPluginImpl::getPlugin()
 {
     ASSERT(m_pluginContainer);
     ASSERT(m_pluginContainer->plugin());
     return m_pluginContainer->plugin();
 }
 
 } // namespace blink