Enable clang style plugin in webrtc/modules/desktop_capture

webrtc/modules/desktop_capture/win/dxgi_duplicator_controller.cc

 /*
  *  Copyright (c) 2016 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/win/dxgi_duplicator_controller.h"
 
 #include <windows.h>
 
 #include <algorithm>
 
 #include "webrtc/base/checks.h"
 
 namespace webrtc {
 
+DxgiDuplicatorController::Context::Context() {}
+
 DxgiDuplicatorController::Context::~Context() {
   DxgiDuplicatorController::Instance()->Unregister(this);
 }
 
 // static
 DxgiDuplicatorController* DxgiDuplicatorController::Instance() {
   // The static instance won't be deleted to ensure it can be used by other
   // threads even during program exiting.
   static DxgiDuplicatorController* instance = new DxgiDuplicatorController();
   return instance;
@@ skipping 194 matching lines @@
       Deinitialize();
       return false;
     }
   }
   // id >= ScreenCount(). This is a user error, so we do not need to
   // deinitialize.
   return false;
 }
 
 }  // namespace webrtc