Trace where timers were scheduled in Blink

Source/core/html/HTMLFormElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 476 matching lines @@
     else if (result == AutocompleteResultErrorCancel)
         event = AutocompleteErrorEvent::create("cancel");
     else if (result == AutocompleteResultErrorInvalid)
         event = AutocompleteErrorEvent::create("invalid");
 
     event->setTarget(this);
     m_pendingAutocompleteEvents.append(event.release());
 
     // Dispatch events later as this API is meant to work asynchronously in all situations and implementations.
     if (!m_requestAutocompleteTimer.isActive())
-        m_requestAutocompleteTimer.startOneShot(0);
+        m_requestAutocompleteTimer.startOneShot(0, FROM_HERE);
 }
 
 void HTMLFormElement::requestAutocompleteTimerFired(Timer<HTMLFormElement>*)
 {
     Vector<RefPtr<Event> > pendingEvents;
     m_pendingAutocompleteEvents.swap(pendingEvents);
     for (size_t i = 0; i < pendingEvents.size(); ++i)
         dispatchEvent(pendingEvents[i].release());
 }
 
@@ skipping 308 matching lines @@
 }
 
 void HTMLFormElement::setDemoted(bool demoted)
 {
     if (demoted)
         UseCounter::count(document(), UseCounter::DemotedFormElement);
     m_wasDemoted = demoted;
 }
 
 } // namespace