Enable clang style plugin in webrtc/modules/desktop_capture

webrtc/modules/desktop_capture/desktop_capture_options.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/desktop_capture_options.h"
 
 namespace webrtc {
 
+DesktopCaptureOptions::DesktopCaptureOptions() {}
+DesktopCaptureOptions::DesktopCaptureOptions(
+    const DesktopCaptureOptions& options) = default;
+DesktopCaptureOptions::~DesktopCaptureOptions() {}
+
 // static
 DesktopCaptureOptions DesktopCaptureOptions::CreateDefault() {
   DesktopCaptureOptions result;
 #if defined(USE_X11)
   result.set_x_display(SharedXDisplay::CreateDefault());
 #endif
 #if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
   result.set_configuration_monitor(new DesktopConfigurationMonitor());
   result.set_full_screen_chrome_window_detector(
       new FullScreenChromeWindowDetector());
 #endif
   return result;
 }
 
 }  // namespace webrtc