blink: Cleanup class/struct forward declarations

third_party/WebKit/public/platform/WebFileWriter.h

 /*
  * Copyright (C) 2010 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 19 matching lines @@
 
 #ifndef WebFileWriter_h
 #define WebFileWriter_h
 
 #include "WebCommon.h"
 #include "WebString.h"
 
 namespace blink {
 
 class WebString;
-class WebURL;
 
 class WebFileWriter {
  public:
   virtual ~WebFileWriter() {}
 
   // Only one write or one truncate operation can be in progress at a time.
   // These functions are asynchronous and will report results through the
   // WebFileWriter's associated WebFileWriterClient.
   virtual void write(long long position, const WebString& blobUUID) {}
   virtual void truncate(long long length) = 0;
 
   // Cancel will attempt to abort a running write or truncate. However, it may
   // not be possible to cancel an in-progress action, or the call may have come
   // in too late. Partial writes are possible.
   // Do not call cancel when there is no write or truncate in progress.
   virtual void cancel() = 0;
 };
 
 }  // namespace blink
 
 #endif