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

remoting/host/chromeos/aura_desktop_capturer.h

Index: remoting/host/chromeos/aura_desktop_capturer.h
diff --git a/remoting/host/chromeos/aura_desktop_capturer.h b/remoting/host/chromeos/aura_desktop_capturer.h
index 4ccd5db8a20128df2fee7222dd95f4543dec470e..16c6f85fd4a3b69d6308a8df072cc86d63435782 100644
--- a/remoting/host/chromeos/aura_desktop_capturer.h
+++ b/remoting/host/chromeos/aura_desktop_capturer.h
@@ -25,11 +25,11 @@ namespace remoting {
 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;