Invalidate video elements when starting up media players and changing DisplayMode.

Source/core/layout/LayoutVideo.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 146 matching lines @@
 
 HTMLVideoElement* LayoutVideo::videoElement() const
 {
     return toHTMLVideoElement(node());
 }
 
 void LayoutVideo::updateFromElement()
 {
     LayoutMedia::updateFromElement();
     updatePlayer();
+
+    // If the DisplayMode of the video changed, then we need to paint.
+    setShouldDoFullPaintInvalidation();
 }
 
 void LayoutVideo::updatePlayer()
 {
     updateIntrinsicSize();
 
     WebMediaPlayer* mediaPlayer = mediaElement()->webMediaPlayer();
     if (!mediaPlayer)
         return;
 
@@ skipping 72 matching lines @@
             return CompositingReasonVideo;
     }
 
     if (shouldDisplayVideo() && supportsAcceleratedRendering())
         return CompositingReasonVideo;
 
     return CompositingReasonNone;
 }
 
 } // namespace blink