Delete MaskImageChanged, VideoChanged, and FullScreenChanged

Source/core/rendering/RenderVideo.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010 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 192 matching lines @@
 {
     updateIntrinsicSize();
 
     MediaPlayer* mediaPlayer = mediaElement()->player();
     if (!mediaPlayer)
         return;
 
     if (!videoElement()->isActive())
         return;
 
-    contentChanged(VideoChanged);
+    videoElement()->setNeedsCompositingUpdate();

[ojan, 2014/06/11 18:22:15]

This loses the m_compositedLayerMapping->contentChanged(changeType) call. Is
that OK?

 }
 
 LayoutUnit RenderVideo::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const
 {
     return RenderReplaced::computeReplacedLogicalWidth(shouldComputePreferred);
 }
 
 LayoutUnit RenderVideo::computeReplacedLogicalHeight() const
 {
     return RenderReplaced::computeReplacedLogicalHeight();
@@ skipping 58 matching lines @@
             return CompositingReasonVideo;
     }
 
     if ((triggers & VideoTrigger) && shouldDisplayVideo() && supportsAcceleratedRendering())
         return CompositingReasonVideo;
 
     return CompositingReasonNone;
 }
 
 } // namespace WebCore