Revert "Remove MediaStreamTrack.getSources()."

third_party/WebKit/Source/modules/mediastream/UserMediaController.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 31 matching lines @@
  public:
   static UserMediaController* create(std::unique_ptr<UserMediaClient>);
 
   DECLARE_VIRTUAL_TRACE();
 
   UserMediaClient* client() const { return m_client.get(); }
 
   void requestUserMedia(UserMediaRequest*);
   void cancelUserMediaRequest(UserMediaRequest*);
   void requestMediaDevices(MediaDevicesRequest*);
+  void requestSources(MediaStreamTrackSourcesRequest*);
   void setMediaDeviceChangeObserver(MediaDevices*);
 
   static const char* supplementName();
   static UserMediaController* from(LocalFrame* frame) {
     return static_cast<UserMediaController*>(
         Supplement<LocalFrame>::from(frame, supplementName()));
   }
 
  private:
   explicit UserMediaController(std::unique_ptr<UserMediaClient>);
 
   std::unique_ptr<UserMediaClient> m_client;
 };
 
 inline void UserMediaController::requestUserMedia(UserMediaRequest* request) {
   m_client->requestUserMedia(request);
 }
 
 inline void UserMediaController::cancelUserMediaRequest(
     UserMediaRequest* request) {
   m_client->cancelUserMediaRequest(request);
 }
 
 inline void UserMediaController::requestMediaDevices(
     MediaDevicesRequest* request) {
   m_client->requestMediaDevices(request);
 }
 
+inline void UserMediaController::requestSources(
+    MediaStreamTrackSourcesRequest* request) {
+  m_client->requestSources(request);
+}
+
 inline void UserMediaController::setMediaDeviceChangeObserver(
     MediaDevices* observer) {
   m_client->setMediaDeviceChangeObserver(observer);
 }
 
 }  // namespace blink
 
 #endif  // UserMediaController_h