Ability to block <audio> and <video> media.

Source/core/loader/FrameLoaderClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google 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 163 matching lines @@
         virtual void willReleaseScriptContext(v8::Handle<v8::Context>, int worldId) = 0;
         virtual bool allowScriptExtension(const String& extensionName, int extensionGroup, int worldId) = 0;
 
         virtual void didChangeScrollOffset() { }
         virtual void didUpdateCurrentHistoryItem() { }
 
         virtual bool allowScript(bool enabledPerSettings) { return enabledPerSettings; }
         virtual bool allowScriptFromSource(bool enabledPerSettings, const KURL&) { return enabledPerSettings; }
         virtual bool allowPlugins(bool enabledPerSettings) { return enabledPerSettings; }
         virtual bool allowImage(bool enabledPerSettings, const KURL&) { return enabledPerSettings; }
+        virtual bool allowMedia(const KURL&) { return true; }
         virtual bool allowDisplayingInsecureContent(bool enabledPerSettings, SecurityOrigin*, const KURL&) { return enabledPerSettings; }
         virtual bool allowRunningInsecureContent(bool enabledPerSettings, SecurityOrigin*, const KURL&) { return enabledPerSettings; }
 
         // This callback notifies the client that the frame was about to run
         // JavaScript but did not because allowScript returned false. We
         // have a separate callback here because there are a number of places
         // that need to know if JavaScript is enabled but are not necessarily
         // preparing to execute script.
         virtual void didNotAllowScript() { }
         // This callback is similar, but for plugins.
@@ skipping 32 matching lines @@
         virtual void didStopAllLoaders() { }
 
         virtual void dispatchDidChangeManifest() { }
 
         virtual bool isFrameLoaderClientImpl() const { return false; }
     };
 
 } // namespace WebCore
 
 #endif // FrameLoaderClient_h