Add OVERRIDE to webkit/.

webkit/tools/test_shell/simple_file_writer.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_TOOLS_TEST_SHELL_SIMPLE_FILE_WRITER_H_
 #define WEBKIT_TOOLS_TEST_SHELL_SIMPLE_FILE_WRITER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "webkit/fileapi/webfilewriter_base.h"
@@ skipping 20 matching lines @@
   // created and destroyed.
   static void InitializeOnIOThread(net::URLRequestContext* request_context) {
     request_context_ = request_context;
   }
   static void CleanupOnIOThread() {
     request_context_ = NULL;
   }
 
  protected:
   // WebFileWriterBase overrides
-  virtual void DoTruncate(const GURL& path, int64 offset);
+  virtual void DoTruncate(const GURL& path, int64 offset) OVERRIDE;
   virtual void DoWrite(const GURL& path, const GURL& blob_url,
-                       int64 offset);
-  virtual void DoCancel();
+                       int64 offset) OVERRIDE;
+  virtual void DoCancel() OVERRIDE;
 
  private:
   class IOThreadProxy;
   scoped_refptr<IOThreadProxy> io_thread_proxy_;
   static net::URLRequestContext* request_context_;
 };
 
 #endif  // WEBKIT_TOOLS_TEST_SHELL_SIMPLE_FILE_WRITER_H_