Let the effective media volume be 0 if the media element is muted

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 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.
@@ skipping 1779 matching lines @@
         return;
     }
     document->page()->setIsCursorVisible(isVisible);
 }
 
 void Internals::mediaPlayerRequestFullscreen(HTMLMediaElement* mediaElement)
 {
     mediaElement->mediaPlayerRequestFullscreen();
 }
 
+double Internals::effectiveMediaVolume(HTMLMediaElement* mediaElement)
+{
+    return mediaElement->effectiveMediaVolume();
+}
+
 void Internals::registerURLSchemeAsBypassingContentSecurityPolicy(const String& scheme)
 {
     SchemeRegistry::registerURLSchemeAsBypassingContentSecurityPolicy(scheme);
 }
 
 void Internals::removeURLSchemeRegisteredAsBypassingContentSecurityPolicy(const String& scheme)
 {
     SchemeRegistry::removeURLSchemeRegisteredAsBypassingContentSecurityPolicy(scheme);
 }
 
@@ skipping 444 matching lines @@
 
     StringBuilder markup;
     Vector<Document::TransitionElementData>::iterator iter = elementData.begin();
     for (; iter != elementData.end(); ++iter)
         markup.append(iter->markup);
 
     return markup.toString();
 }
 
 } // namespace blink