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

device/hid/hid_connection_win.h

 // Copyright (c) 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 DEVICE_HID_HID_CONNECTION_WIN_H_
 #define DEVICE_HID_HID_CONNECTION_WIN_H_
 
 #include <windows.h>
 
 #include <set>
 
 #include "base/win/scoped_handle.h"
 #include "device/hid/hid_connection.h"
 
 namespace device {
 
 struct PendingHidTransfer;
 
 class HidConnectionWin : public HidConnection {
  public:
   HidConnectionWin(scoped_refptr<HidDeviceInfo> device_info,
                    base::win::ScopedHandle file);
 
  private:
   friend class HidServiceWin;
   friend struct PendingHidTransfer;
 
-  ~HidConnectionWin();
+  ~HidConnectionWin() override;
 
   // HidConnection implementation.
-  virtual void PlatformClose() override;
-  virtual void PlatformRead(const ReadCallback& callback) override;
-  virtual void PlatformWrite(scoped_refptr<net::IOBuffer> buffer,
-                             size_t size,
-                             const WriteCallback& callback) override;
-  virtual void PlatformGetFeatureReport(uint8_t report_id,
-                                        const ReadCallback& callback) override;
-  virtual void PlatformSendFeatureReport(
-      scoped_refptr<net::IOBuffer> buffer,
-      size_t size,
-      const WriteCallback& callback) override;
+  void PlatformClose() override;
+  void PlatformRead(const ReadCallback& callback) override;
+  void PlatformWrite(scoped_refptr<net::IOBuffer> buffer,
+                     size_t size,
+                     const WriteCallback& callback) override;
+  void PlatformGetFeatureReport(uint8_t report_id,
+                                const ReadCallback& callback) override;
+  void PlatformSendFeatureReport(scoped_refptr<net::IOBuffer> buffer,
+                                 size_t size,
+                                 const WriteCallback& callback) override;
 
   void OnReadComplete(scoped_refptr<net::IOBuffer> buffer,
                       const ReadCallback& callback,
                       PendingHidTransfer* transfer,
                       bool signaled);
   void OnReadFeatureComplete(scoped_refptr<net::IOBuffer> buffer,
                              const ReadCallback& callback,
                              PendingHidTransfer* transfer,
                              bool signaled);
   void OnWriteComplete(const WriteCallback& callback,
                        PendingHidTransfer* transfer,
                        bool signaled);
 
   base::win::ScopedHandle file_;
 
   std::set<scoped_refptr<PendingHidTransfer> > transfers_;
 
   DISALLOW_COPY_AND_ASSIGN(HidConnectionWin);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_HID_HID_CONNECTION_WIN_H_