Cleanup: Remove unneeded forward declarations in webkit/.

webkit/fileapi/webfilewriter_base.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_FILEAPI_WEBFILEWRITER_BASE_H_
 #define WEBKIT_FILEAPI_WEBFILEWRITER_BASE_H_
 
 #include "base/platform_file.h"
 #include "googleurl/src/gurl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFileWriter.h"
 
 namespace WebKit {
 class WebFileWriterClient;
-class WebString;
 class WebURL;
 }
 
 namespace fileapi {
 
 class WebFileWriterBase : public WebKit::WebFileWriter {
  public:
   WebFileWriterBase(
       const GURL& path, WebKit::WebFileWriterClient* client);
   virtual ~WebFileWriterBase();
@@ skipping 33 matching lines @@
 
   GURL path_;
   WebKit::WebFileWriterClient* client_;
   OperationType operation_;
   CancelState cancel_state_;
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_WEBFILEWRITER_BASE_H_