Check origin before providing initData in encrypted event

Source/core/html/HTMLMediaElement.h

 /*
  * 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 263 matching lines @@
 #if ENABLE(WEB_AUDIO)
     AudioSourceProviderClient* audioSourceNode() { return m_audioSourceNode; }
     void setAudioSourceNode(AudioSourceProviderClient*);
 
     AudioSourceProvider* audioSourceProvider();
 #endif
 
     enum InvalidURLAction { DoNothing, Complain };
     bool isSafeToLoadURL(const KURL&, InvalidURLAction);
 
+    // Checks to see if current media data is CORS-same-origin as the
+    // specified origin.
+    bool isMediaDataCORSSameOrigin(SecurityOrigin*) const;
+
     MediaController* controller() const;
     void setController(PassRefPtrWillBeRawPtr<MediaController>); // Resets the MediaGroup and sets the MediaController.
 
     void scheduleEvent(PassRefPtrWillBeRawPtr<Event>);
 
     // Returns the "effective media volume" value as specified in the HTML5 spec.
     double effectiveMediaVolume() const;
 
 #if ENABLE(OILPAN)
     bool isFinalizing() const { return m_isFinalizing; }
@@ skipping 335 matching lines @@
 inline bool isHTMLMediaElement(const HTMLElement& element)
 {
     return isHTMLAudioElement(element) || isHTMLVideoElement(element);
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLMediaElement);
 
 } // namespace blink
 
 #endif // HTMLMediaElement_h