Move video send/receive stream headers to webrtc/call.

webrtc/media/base/videosourceinterface.h

Index: webrtc/media/base/videosourceinterface.h
diff --git a/webrtc/media/base/videosourceinterface.h b/webrtc/media/base/videosourceinterface.h
index 6ebff334da7007dcbbaf60ee22e9a88c39765fef..24b3bed5b62e891af7b9c58504088b0286d83f45 100644
--- a/webrtc/media/base/videosourceinterface.h
+++ b/webrtc/media/base/videosourceinterface.h
@@ -19,6 +19,8 @@ namespace rtc {
 // VideoSinkWants is used for notifying the source of properties a video frame
 // should have when it is delivered to a certain sink.
 struct VideoSinkWants {
+  VideoSinkWants();
+  ~VideoSinkWants();
   // Tells the source whether the sink wants frames with rotation applied.
   // By default, any rotation must be applied by the sink.
   bool rotation_applied = false;