Pass the encoder's internal source property through to video_sender to request a keyframe from the e

webrtc/video_send_stream.h

Index: webrtc/video_send_stream.h
diff --git a/webrtc/video_send_stream.h b/webrtc/video_send_stream.h
index 540f5be46232b82537ea6ed857f27c286dccf084..fe61ad771583016b0d28cd001916d7a613485c1a 100644
--- a/webrtc/video_send_stream.h
+++ b/webrtc/video_send_stream.h
@@ -72,6 +72,10 @@ class VideoSendStream : public SendStream {
       std::string payload_name;
       int payload_type = -1;
 
+      // TODO(sophiechang): Delete this field when no one is using internal
+      // sources anymore.
+      bool internal_source = false;
+
       // Uninitialized VideoEncoder instance to be used for encoding. Will be
       // initialized from inside the VideoSendStream.
       VideoEncoder* encoder = nullptr;