chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/fileapi/file_system_backend_delegate.h

 // Copyright 2013 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 CHROME_BROWSER_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_
 #define CHROME_BROWSER_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/callback_forward.h"
 #include "storage/browser/fileapi/file_system_backend.h"
 #include "storage/common/fileapi/file_system_types.h"
 
-class GURL;
-
 namespace base {
 class Time;
 }  // namespace base
 
 namespace storage {
 class AsyncFileUtil;
 class FileSystemContext;
 class FileStreamReader;
 class FileSystemURL;
 class FileStreamWriter;
@@ skipping 35 matching lines @@
   // that the returned URL is secure to be opened in a browser tab, or referred
   // from <img>, <video>, XMLHttpRequest, etc...
   virtual void GetRedirectURLForContents(
       const storage::FileSystemURL& url,
       const storage::URLCallback& callback) = 0;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_