Update {virtual,override} to follow C++11 style in content.

content/browser/gamepad/raw_input_data_fetcher_win.h

 // Copyright 2014 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 CONTENT_BROWSER_GAMEPAD_RAW_INPUT_DATA_FETCHER_WIN_H_
 #define CONTENT_BROWSER_GAMEPAD_RAW_INPUT_DATA_FETCHER_WIN_H_
 
 #include "build/build_config.h"
 
 #include <stdlib.h>
@@ skipping 41 matching lines @@
 };
 
 class RawInputDataFetcher
     : public base::SupportsWeakPtr<RawInputDataFetcher>,
       public base::MessageLoop::DestructionObserver {
  public:
   explicit RawInputDataFetcher();
   ~RawInputDataFetcher();
 
   // DestructionObserver overrides.
-  virtual void WillDestroyCurrentMessageLoop() override;
+  void WillDestroyCurrentMessageLoop() override;
 
   bool Available() { return rawinput_available_; }
   void StartMonitor();
   void StopMonitor();
 
   std::vector<RawGamepadInfo*> EnumerateDevices();
   RawGamepadInfo* GetGamepadInfo(HANDLE handle);
 
  private:
   RawGamepadInfo* ParseGamepadInfo(HANDLE hDevice);
@@ skipping 57 matching lines @@
   HidPGetUsageValueFunc hidp_get_usage_value_;
   HidPGetScaledUsageValueFunc hidp_get_scaled_usage_value_;
   HidDGetStringFunc hidd_get_product_string_;
 
   DISALLOW_COPY_AND_ASSIGN(RawInputDataFetcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GAMEPAD_RAW_INPUT_DATA_FETCHER_WIN_H_