Adds unit tests for VideoSendStreamImpl.

Bug: None
Change-Id: Ifadad47af4769d8aca42c98832cea49a6c7977cd
Reviewed-on: https://webrtc-review.googlesource.com/71040
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22959}
diff --git a/video/video_send_stream_impl.cc b/video/video_send_stream_impl.cc
index 8d9b480..5e032fc 100644
--- a/video/video_send_stream_impl.cc
+++ b/video/video_send_stream_impl.cc
@@ -283,9 +283,9 @@
     rtc::TaskQueue* worker_queue,
     CallStats* call_stats,
     RtpTransportControllerSendInterface* transport,
-    BitrateAllocator* bitrate_allocator,
+    BitrateAllocatorInterface* bitrate_allocator,
     SendDelayStats* send_delay_stats,
-    VideoStreamEncoder* video_stream_encoder,
+    VideoStreamEncoderInterface* video_stream_encoder,
     RtcEventLog* event_log,
     const VideoSendStream::Config* config,
     int initial_encoder_max_bitrate,