Enable clang style plugin in webrtc/modules/desktop_capture

webrtc/modules/desktop_capture/window_capturer_null.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/modules/desktop_capture/window_capturer.h"
 
 #include <assert.h>
 
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/modules/desktop_capture/desktop_frame.h"
 
 namespace webrtc {
 
 namespace {
 
 class WindowCapturerNull : public WindowCapturer {
  public:
   WindowCapturerNull();
-  virtual ~WindowCapturerNull();
+  ~WindowCapturerNull() override;
 
   // WindowCapturer interface.
   bool GetWindowList(WindowList* windows) override;
   bool SelectWindow(WindowId id) override;
   bool BringSelectedWindowToFront() override;
 
   // DesktopCapturer interface.
   void Start(Callback* callback) override;
   void CaptureFrame() override;
 
@@ skipping 34 matching lines @@
 }
 
 }  // namespace
 
 // static
 WindowCapturer* WindowCapturer::Create(const DesktopCaptureOptions& options) {
   return new WindowCapturerNull();
 }
 
 }  // namespace webrtc