Update {virtual,override,final} to follow C++11 style in remoting, round 2.

remoting/host/chromeos/aura_desktop_capturer.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 REMOTING_HOST_CHROMEOS_AURA_DESKTOP_CAPTURER_H_
 #define REMOTING_HOST_CHROMEOS_AURA_DESKTOP_CAPTURER_H_
 
 #include "base/memory/weak_ptr.h"
 #include "third_party/webrtc/modules/desktop_capture/screen_capturer.h"
 
 namespace cc {
 class CopyOutputResult;
 }  // namespace cc
 
 namespace aura {
 class Window;
 }  // namespace aura
 
 namespace remoting {
 
 // A webrtc::DesktopCapturer that captures pixels from the root window of the
 // Aura Shell.  This is implemented by requesting the layer and its substree to
 // be rendered to a given data structure.  Start() and Capture() must be called
 // on the Browser UI thread.
 class AuraDesktopCapturer : public webrtc::DesktopCapturer {
  public:
   AuraDesktopCapturer();
-  virtual ~AuraDesktopCapturer();
+  ~AuraDesktopCapturer() override;
 
   // webrtc::DesktopCapturer implementation.
-  virtual void Start(webrtc::DesktopCapturer::Callback* callback) override;
-  virtual void Capture(const webrtc::DesktopRegion& region) override;
+  void Start(webrtc::DesktopCapturer::Callback* callback) override;
+  void Capture(const webrtc::DesktopRegion& region) override;
 
  private:
   friend class AuraDesktopCapturerTest;
 
   // Called when a copy of the layer is captured.
   void OnFrameCaptured(scoped_ptr<cc::CopyOutputResult> result);
 
   // Points to the callback passed to webrtc::DesktopCapturer::Start().
   webrtc::DesktopCapturer::Callback* callback_;
 
   // The root window of the Aura Shell.
   aura::Window* desktop_window_;
 
   base::WeakPtrFactory<AuraDesktopCapturer> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AuraDesktopCapturer);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_CHROMEOS_AURA_DESKTOP_CAPTURER_H_