Enable clang style plugin in webrtc/modules/desktop_capture

webrtc/modules/desktop_capture/window_capturer_mac.mm

 /*
  *  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.
  */
 
@@ skipping 28 matching lines @@
   CFRelease(window_id_array);
   CFRelease(window_array);
 
   return valid;
 }
 
 class WindowCapturerMac : public WindowCapturer {
  public:
   explicit WindowCapturerMac(rtc::scoped_refptr<FullScreenChromeWindowDetector>
                                  full_screen_chrome_window_detector);
-  virtual ~WindowCapturerMac();
+  ~WindowCapturerMac() 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 175 matching lines @@
 }
 
 }  // namespace
 
 // static
 WindowCapturer* WindowCapturer::Create(const DesktopCaptureOptions& options) {
   return new WindowCapturerMac(options.full_screen_chrome_window_detector());
 }
 
 }  // namespace webrtc