Enable clang style plugin in webrtc/modules/desktop_capture

webrtc/modules/desktop_capture/mouse_cursor_monitor_x11.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.
  */
 
@@ skipping 44 matching lines @@
 }
 
 }  // namespace
 
 namespace webrtc {
 
 class MouseCursorMonitorX11 : public MouseCursorMonitor,
                               public SharedXDisplay::XEventHandler {
  public:
   MouseCursorMonitorX11(const DesktopCaptureOptions& options, Window window);
-  virtual ~MouseCursorMonitorX11();
+  ~MouseCursorMonitorX11() override;
 
   void Init(Callback* callback, Mode mode) override;
   void Capture() override;
 
  private:
   // SharedXDisplay::XEventHandler interface.
   bool HandleXEvent(const XEvent& event) override;
 
   Display* display() { return x_display_->display(); }
 
@@ skipping 148 matching lines @@
 MouseCursorMonitor* MouseCursorMonitor::CreateForScreen(
     const DesktopCaptureOptions& options,
     ScreenId screen) {
   if (!options.x_display())
     return NULL;
   return new MouseCursorMonitorX11(
       options, DefaultRootWindow(options.x_display()->display()));
 }
 
 }  // namespace webrtc