Check origin before providing initData in encrypted event

Source/core/html/HTMLVideoElement.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 298 matching lines @@
     }
 
     paintCurrentFrameInContext(imageBuffer->context(), IntRect(IntPoint(0, 0), intrinsicSize));
 
     *status = NormalSourceImageStatus;
     return imageBuffer->copyImage(mode == CopySourceImageIfVolatile ? CopyBackingStore : DontCopyBackingStore, Unscaled);
 }
 
 bool HTMLVideoElement::wouldTaintOrigin(SecurityOrigin* destinationSecurityOrigin) const
 {
-    return !hasSingleSecurityOrigin() || (!(webMediaPlayer() && webMediaPlayer()->didPassCORSAccessCheck()) && destinationSecurityOrigin->taintsCanvas(currentSrc()));
+    return !isMediaDataCORSSameOrigin(destinationSecurityOrigin);
 }
 
 FloatSize HTMLVideoElement::sourceSize() const
 {
     return FloatSize(videoWidth(), videoHeight());
 }
 
 }