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

remoting/host/chromeos/skia_bitmap_desktop_frame.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.
 
 #include "base/memory/scoped_ptr.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
 
 namespace remoting {
 
 // DesktopFrame implementation used by screen capture on ChromeOS.
 // Frame data is stored in a SkBitmap.
 class SkiaBitmapDesktopFrame : public webrtc::DesktopFrame {
  public:
   static SkiaBitmapDesktopFrame* Create(scoped_ptr<SkBitmap> bitmap);
-  virtual ~SkiaBitmapDesktopFrame();
+  ~SkiaBitmapDesktopFrame() override;
 
  private:
   SkiaBitmapDesktopFrame(webrtc::DesktopSize size,
                          int stride,
                          uint8_t* data,
                          scoped_ptr<SkBitmap> bitmap);
 
   scoped_ptr<SkBitmap> bitmap_;
 
   DISALLOW_COPY_AND_ASSIGN(SkiaBitmapDesktopFrame);
 };
 
 }  // namespace remoting