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

Source/core/testing/Internals.h

 /*
  * 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 235 matching lines @@
 
     int numberOfPages(float pageWidthInPixels = 800, float pageHeightInPixels = 600);
     String pageProperty(String, int, ExceptionState& = ASSERT_NO_EXCEPTION) const;
     String pageSizeAndMarginsInPixels(int, int, int, int, int, int, int, ExceptionState& = ASSERT_NO_EXCEPTION) const;
 
     void setDeviceScaleFactor(float scaleFactor, ExceptionState&);
 
     void setIsCursorVisible(Document*, bool, ExceptionState&);
 
     void mediaPlayerRequestFullscreen(HTMLMediaElement*);
+    double effectiveMediaVolume(HTMLMediaElement*);
 
     void registerURLSchemeAsBypassingContentSecurityPolicy(const String& scheme);
     void removeURLSchemeRegisteredAsBypassingContentSecurityPolicy(const String& scheme);
 
     PassRefPtrWillBeRawPtr<TypeConversions> typeConversions() const;
     PrivateScriptTest* privateScriptTest() const;
 
     Vector<String> getReferencedFilePaths() const;
 
     void startTrackingRepaints(Document*, ExceptionState&);
@@ skipping 60 matching lines @@
     PassRefPtrWillBeRawPtr<ClientRectList> annotatedRegions(Document*, bool draggable, ExceptionState&);
 
     DocumentMarker* markerAt(Node*, const String& markerType, unsigned index, ExceptionState&);
     RefPtrWillBeMember<InternalRuntimeFlags> m_runtimeFlags;
     RefPtrWillBeMember<InternalProfilers> m_profilers;
 };
 
 } // namespace blink
 
 #endif