Implement Chromium side of MediaKeys.isTypeSupported().

content/renderer/renderer_webkitplatformsupport_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_
 #define CONTENT_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/id_map.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 75 matching lines @@
   virtual long databaseGetFileAttributes(
       const blink::WebString& vfs_file_name);
   virtual long long databaseGetFileSize(
       const blink::WebString& vfs_file_name);
   virtual long long databaseGetSpaceAvailableForOrigin(
       const blink::WebString& origin_identifier);
   virtual blink::WebString signedPublicKeyAndChallengeString(
       unsigned key_size_index,
       const blink::WebString& challenge,
       const blink::WebURL& url);
+  virtual blink::WebContentDecryptionModule::KeySystemSupportedResult
+      isKeySystemSupported(const blink::WebString& key_system,
+                           const blink::WebString& init_data_type,
+                           const blink::WebString& container,
+                           const blink::WebString& codecs,
+                           const blink::WebString& capability);
   virtual void getPluginList(bool refresh,
                              blink::WebPluginListBuilder* builder);
   virtual blink::WebPublicSuffixList* publicSuffixList();
   virtual void screenColorProfile(blink::WebVector<char>* to_profile);
   virtual blink::WebScrollbarBehavior* scrollbarBehavior();
   virtual blink::WebIDBFactory* idbFactory();
   virtual blink::WebFileSystem* fileSystem();
   virtual bool canAccelerate2dCanvas();
   virtual bool isThreadedCompositingEnabled();
   virtual double audioHardwareSampleRate();
@@ skipping 133 matching lines @@
   scoped_ptr<BatteryStatusDispatcher> battery_status_dispatcher_;
 
   IDMap<PlatformEventObserverBase, IDMapOwnPointer> platform_event_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererWebKitPlatformSupportImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_