blink: Cleanup class/struct forward declarations

third_party/WebKit/public/platform/WebContentDecryptionModuleSession.h

 /*
  * Copyright (C) 2013 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 23 matching lines @@
 #include "WebCommon.h"
 #include "WebVector.h"
 #include "public/platform/WebContentDecryptionModuleException.h"
 #include "public/platform/WebContentDecryptionModuleResult.h"
 #include "public/platform/WebEncryptedMediaTypes.h"
 
 namespace blink {
 
 class WebEncryptedMediaKeyInformation;
 class WebString;
-class WebURL;
 
 class BLINK_PLATFORM_EXPORT WebContentDecryptionModuleSession {
  public:
   class BLINK_PLATFORM_EXPORT Client {
    public:
     enum class MessageType { LicenseRequest, LicenseRenewal, LicenseRelease };
 
     virtual void message(MessageType,
                          const unsigned char* message,
                          size_t messageLength) = 0;
@@ skipping 32 matching lines @@
   virtual void update(const unsigned char* response,
                       size_t responseLength,
                       WebContentDecryptionModuleResult) = 0;
   virtual void close(WebContentDecryptionModuleResult) = 0;
   virtual void remove(WebContentDecryptionModuleResult) = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebContentDecryptionModuleSession_h