Remove unneeded WebKit enum forward declarations

third_party/WebKit/public/web/WebSharedWorkerRepositoryClient.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 20 matching lines @@
 #ifndef WebSharedWorkerRepositoryClient_h
 #define WebSharedWorkerRepositoryClient_h
 
 #include "WebSharedWorkerCreationContextType.h"
 #include "WebSharedWorkerCreationErrors.h"
 #include "public/platform/WebAddressSpace.h"
 #include <memory>
 
 namespace blink {
 
-enum WebContentSecurityPolicyType;
 class WebMessagePortChannel;
 class WebSharedWorkerConnectListener;
 class WebString;
 class WebURL;
 
 class WebSharedWorkerRepositoryClient {
  public:
   // Unique identifier for the parent document of a worker (unique within a
   // given process).
   using DocumentID = unsigned long long;
@@ skipping 11 matching lines @@
   }
 
   // Invoked when a document has been detached. DocumentID can be re-used after
   // documentDetached() is invoked.
   virtual void DocumentDetached(DocumentID) {}
 };
 
 }  // namespace blink
 
 #endif  // WebSharedWorkerRepositoryClient_h