Interface for requestSources through UserMediaController/Client.

Source/modules/mediastream/UserMediaClient.h

 /*
  * Copyright (C) 2011 Ericsson AB. 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
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef UserMediaClient_h
 #define UserMediaClient_h
 
 #include "modules/mediastream/MediaDevicesRequest.h"
 #include "modules/mediastream/UserMediaRequest.h"
+#include "platform/mediastream/MediaStreamTrackSourcesRequest.h"
 
 namespace blink {
 
 class LocalFrame;
 
 class UserMediaClient {
 public:
     virtual void requestUserMedia(UserMediaRequest*) = 0;
     virtual void cancelUserMediaRequest(UserMediaRequest*) = 0;
     virtual void requestMediaDevices(MediaDevicesRequest*) = 0;
     virtual void cancelMediaDevicesRequest(MediaDevicesRequest*) = 0;
+    virtual void requestSources(MediaStreamTrackSourcesRequest*) = 0;
 
 protected:
     virtual ~UserMediaClient() { }
 };
 
 void provideUserMediaTo(LocalFrame&, UserMediaClient*);
 
 } // namespace blink
 
 #endif // UserMediaClient_h