blink: Cleanup class/struct forward declarations

third_party/WebKit/public/platform/WebMediaPlayerEncryptedMediaClient.h

 /*
  * 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #ifndef WebMediaPlayerEncryptedMediaClient_h
 #define WebMediaPlayerEncryptedMediaClient_h
 
 #include "WebCommon.h"
 #include "WebEncryptedMediaTypes.h"
 
 namespace blink {
 
-class WebString;
-class WebURL;
-
 class BLINK_PLATFORM_EXPORT WebMediaPlayerEncryptedMediaClient {
  public:
   virtual void encrypted(WebEncryptedMediaInitDataType,
                          const unsigned char* initData,
                          unsigned initDataLength) = 0;
   virtual void didBlockPlaybackWaitingForKey() = 0;
   virtual void didResumePlaybackBlockedForKey() = 0;
 
  protected:
   ~WebMediaPlayerEncryptedMediaClient() {}
 };
 
 }  // namespace blink
 
 #endif