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

device/bluetooth/bluetooth_socket_win.h

Index: device/bluetooth/bluetooth_socket_win.h
diff --git a/device/bluetooth/bluetooth_socket_win.h b/device/bluetooth/bluetooth_socket_win.h
index 38c1664cf272952bf3162d100b3e3b7ee64c5e2b..b5d3ef8dc5c8a766af6f7b5e1ea9b2aa6f348e60 100644
--- a/device/bluetooth/bluetooth_socket_win.h
+++ b/device/bluetooth/bluetooth_socket_win.h
@@ -54,11 +54,11 @@ class BluetoothSocketWin : public BluetoothSocketNet {
   void ResetData();
 
   // BluetoothSocket:
-  virtual void Accept(const AcceptCompletionCallback& success_callback,
-                      const ErrorCompletionCallback& error_callback) override;
+  void Accept(const AcceptCompletionCallback& success_callback,
+              const ErrorCompletionCallback& error_callback) override;
 
  protected:
-  virtual ~BluetoothSocketWin();
+  ~BluetoothSocketWin() override;
 
  private:
   struct ServiceRegData;