Trace where timers were scheduled in Blink

Source/core/html/shadow/MediaControls.cpp

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011, 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 354 matching lines @@
         return;
 
     makeTransparent();
 }
 
 void MediaControls::startHideFullscreenControlsTimer()
 {
     if (!m_isFullscreen)
         return;
 
-    m_hideFullscreenControlsTimer.startOneShot(timeWithoutMouseMovementBeforeHidingFullscreenControls);
+    m_hideFullscreenControlsTimer.startOneShot(timeWithoutMouseMovementBeforeHidingFullscreenControls, FROM_HERE);
 }
 
 void MediaControls::stopHideFullscreenControlsTimer()
 {
     m_hideFullscreenControlsTimer.stop();
 }
 
 const AtomicString& MediaControls::shadowPseudoId() const
 {
     DEFINE_STATIC_LOCAL(AtomicString, id, ("-webkit-media-controls"));
@@ skipping 45 matching lines @@
     m_textDisplayContainer->updateDisplay();
 }
 
 void MediaControls::insertTextTrackContainer(PassRefPtr<MediaControlTextTrackContainerElement> textTrackContainer)
 {
     // Insert it before the first controller element so it always displays behind the controls.
     insertBefore(textTrackContainer, m_enclosure);
 }
 
 }