Implement media cast buttons

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 1708 matching lines @@
 void Internals::mediaPlayerRequestFullscreen(HTMLMediaElement* mediaElement)
 {
     mediaElement->mediaPlayerRequestFullscreen();
 }
 
 double Internals::effectiveMediaVolume(HTMLMediaElement* mediaElement)
 {
     return mediaElement->effectiveMediaVolume();
 }
 
+void Internals::mediaPlayerRemoteRouteAvailabilityChanged(HTMLMediaElement* mediaElement, bool available)
+{
+    mediaElement->remoteRouteAvailabilityChanged(available);
+}
+
 void Internals::registerURLSchemeAsBypassingContentSecurityPolicy(const String& scheme)
 {
     SchemeRegistry::registerURLSchemeAsBypassingContentSecurityPolicy(scheme);
 }
 
 void Internals::removeURLSchemeRegisteredAsBypassingContentSecurityPolicy(const String& scheme)
 {
     SchemeRegistry::removeURLSchemeRegisteredAsBypassingContentSecurityPolicy(scheme);
 }
 
@@ skipping 480 matching lines @@
     }
     if (!element->isPluginElement()) {
         exceptionState.throwDOMException(InvalidNodeTypeError, "The element provided is not a plugin.");
         return;
     }
     element->ensureUserAgentShadowRoot().setInnerHTML(htmlSource, exceptionState);
     toHTMLPlugInElement(element)->setUsePlaceholderContent(true);
 }
 
 } // namespace blink