Add unit tests for webrtc_media_stream_adapter.cc

content/renderer/media/webrtc/media_stream_video_webrtc_sink.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/webrtc/media_stream_video_webrtc_sink.h"
 
 #include "base/location.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 188 matching lines @@
   DCHECK(libjingle_worker_thread_->BelongsToCurrentThread());
   base::AutoLock auto_lock(capture_adapter_stop_lock_);
   if (capture_adapter_)
     capture_adapter_->OnFrameCaptured(frame);
 }
 
 MediaStreamVideoWebRtcSink::MediaStreamVideoWebRtcSink(
     const blink::WebMediaStreamTrack& track,
     PeerConnectionDependencyFactory* factory)
     : weak_factory_(this) {
+  DCHECK(MediaStreamVideoTrack::GetVideoTrack(track));
   const blink::WebMediaConstraints& constraints =
       MediaStreamVideoTrack::GetVideoTrack(track)->constraints();
 
   // Check for presence of mediaStreamSource constraint. The value is ignored.
   std::string value;
   bool is_screencast = GetConstraintValueAsString(
       constraints, &blink::WebMediaTrackConstraintSet::mediaStreamSource,
       &value);
 
   // Extract denoising preference, if no value is set this currently falls back
@@ skipping 86 matching lines @@
 void MediaStreamVideoWebRtcSink::OnEnabledChanged(bool enabled) {
   DCHECK(thread_checker_.CalledOnValidThread());
   video_track_->set_enabled(enabled);
 }
 
 void MediaStreamVideoWebRtcSink::RequestRefreshFrame() {
   DCHECK(thread_checker_.CalledOnValidThread());
   content::RequestRefreshFrameFromVideoTrack(connected_track());
 }
 
+rtc::Optional<bool> MediaStreamVideoWebRtcSink::SourceNeedsDenoisingTestHelper()
+    const {
+  return video_source_->needs_denoising();
+}
+
 }  // namespace content