Clean forward declaration in public

public/platform/WebURLRequest.h

 /*
  * Copyright (C) 2009 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 WebURLRequest_h
 #define WebURLRequest_h
 
 #include "WebCommon.h"
 #include "WebHTTPBody.h"
 #include "WebReferrerPolicy.h"
 
 namespace blink {
 
 class ResourceRequest;
-class WebCString;
 class WebHTTPBody;
 class WebHTTPHeaderVisitor;
 class WebString;
 class WebURL;
 class WebURLRequestPrivate;
 
 class WebURLRequest {
 public:
     enum CachePolicy {
         UseProtocolCachePolicy, // normal load
@@ skipping 219 matching lines @@
 protected:
     BLINK_PLATFORM_EXPORT void assign(WebURLRequestPrivate*);
 
 private:
     WebURLRequestPrivate* m_private;
 };
 
 } // namespace blink
 
 #endif