Move RtpTransportControllerSend to a new file.

webrtc/call/rtp_transport_controller_send_interface.h

Index: webrtc/call/rtp_transport_controller_send_interface.h
diff --git a/webrtc/call/rtp_transport_controller_send.h b/webrtc/call/rtp_transport_controller_send_interface.h
similarity index 92%
copy from webrtc/call/rtp_transport_controller_send.h
copy to webrtc/call/rtp_transport_controller_send_interface.h
index f4384d456050cc18847b5cf6b05210158866f021..1fb8fe1c5979428d4dbc152b290bc84b61229198 100644
--- a/webrtc/call/rtp_transport_controller_send.h
+++ b/webrtc/call/rtp_transport_controller_send_interface.h
@@ -8,8 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_CALL_RTP_TRANSPORT_CONTROLLER_SEND_H_
-#define WEBRTC_CALL_RTP_TRANSPORT_CONTROLLER_SEND_H_
+#ifndef WEBRTC_CALL_RTP_TRANSPORT_CONTROLLER_SEND_INTERFACE_H_
+#define WEBRTC_CALL_RTP_TRANSPORT_CONTROLLER_SEND_INTERFACE_H_
 
 namespace webrtc {
 
@@ -56,4 +56,4 @@ class RtpTransportControllerSendInterface {
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_CALL_RTP_TRANSPORT_CONTROLLER_SEND_H_
+#endif  // WEBRTC_CALL_RTP_TRANSPORT_CONTROLLER_SEND_INTERFACE_H_