Avoid trigger compositing update on media player finalization.

Source/core/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 3929 matching lines @@
         return WebMediaPlayer::CORSModeUseCredentials;
     return WebMediaPlayer::CORSModeAnonymous;
 }
 
 void HTMLMediaElement::mediaPlayerSetWebLayer(blink::WebLayer* webLayer)
 {
     if (webLayer == m_webLayer)
         return;
 
     // If either of the layers is null we need to enable or disable compositing. This is done by triggering a style recalc.
-    if (!m_webLayer || !webLayer)
+    if ((!m_webLayer || !webLayer)
+#if ENABLE(OILPAN)
+        && !isFinalizing()
+#endif
+        )
         setNeedsCompositingUpdate();
 
     if (m_webLayer)
         GraphicsLayer::unregisterContentsLayer(m_webLayer);
     m_webLayer = webLayer;
-    if (m_webLayer) {
+    if (m_webLayer)
         GraphicsLayer::registerContentsLayer(m_webLayer);
-    }
 }
 
 void HTMLMediaElement::mediaPlayerMediaSourceOpened(blink::WebMediaSource* webMediaSource)
 {
     m_mediaSource->setWebMediaSourceAndOpen(adoptPtr(webMediaSource));
 }
 
 bool HTMLMediaElement::isInteractiveContent() const
 {
     return fastHasAttribute(controlsAttr);
@@ skipping 60 matching lines @@
 
 #if ENABLE(WEB_AUDIO)
 void HTMLMediaElement::clearWeakMembers(Visitor* visitor)
 {
     if (!visitor->isAlive(m_audioSourceNode) && audioSourceProvider())
         audioSourceProvider()->setClient(0);
 }
 #endif
 
 }