Update constraints processing for video content capture.

content/renderer/media/media_stream_video_track.cc

 // Copyright 2013 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/media_stream_video_track.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 210 matching lines @@
   track.SetTrackData(new MediaStreamVideoTrack(source, callback, enabled));
   return track;
 }
 
 // static
 blink::WebMediaStreamTrack MediaStreamVideoTrack::CreateVideoTrack(
     MediaStreamVideoSource* source,
     const VideoTrackAdapterSettings& adapter_settings,
     const base::Optional<bool>& noise_reduction,
     bool is_screencast,
-    double min_frame_rate,
+    const base::Optional<double>& min_frame_rate,
     const MediaStreamVideoSource::ConstraintsCallback& callback,
     bool enabled) {
   blink::WebMediaStreamTrack track;
   track.Initialize(source->Owner());
   track.SetTrackData(new MediaStreamVideoTrack(
       source, adapter_settings, noise_reduction, is_screencast, min_frame_rate,
       callback, enabled));
   return track;
 }
 
@@ skipping 11 matching lines @@
     MediaStreamVideoSource* source,
     const MediaStreamVideoSource::ConstraintsCallback& callback,
     bool enabled)
     : MediaStreamTrack(true),
       frame_deliverer_(
           new MediaStreamVideoTrack::FrameDeliverer(source->io_task_runner(),
                                                     enabled)),
       adapter_settings_(base::MakeUnique<VideoTrackAdapterSettings>(
           VideoTrackAdapterSettings())),
       is_screencast_(false),
-      min_frame_rate_(0.0),
       source_(source->GetWeakPtr()) {
   if (IsOldVideoConstraints()) {
     blink::WebMediaConstraints constraints;
     constraints.Initialize();
     source->AddTrackLegacy(
         this,
         base::Bind(&MediaStreamVideoTrack::FrameDeliverer::DeliverFrameOnIO,
                    frame_deliverer_),
         constraints, callback);
   } else {
@@ skipping 23 matching lines @@
       base::Bind(&MediaStreamVideoTrack::FrameDeliverer::DeliverFrameOnIO,
                  frame_deliverer_),
       constraints, callback);
 }
 
 MediaStreamVideoTrack::MediaStreamVideoTrack(
     MediaStreamVideoSource* source,
     const VideoTrackAdapterSettings& adapter_settings,
     const base::Optional<bool>& noise_reduction,
     bool is_screen_cast,
-    double min_frame_rate,
+    const base::Optional<double>& min_frame_rate,
     const MediaStreamVideoSource::ConstraintsCallback& callback,
     bool enabled)
     : MediaStreamTrack(true),
       frame_deliverer_(
           new MediaStreamVideoTrack::FrameDeliverer(source->io_task_runner(),
                                                     enabled)),
       adapter_settings_(
           base::MakeUnique<VideoTrackAdapterSettings>(adapter_settings)),
       noise_reduction_(noise_reduction),
       is_screencast_(is_screen_cast),
@@ skipping 119 matching lines @@
 }
 
 void MediaStreamVideoTrack::OnReadyStateChanged(
     blink::WebMediaStreamSource::ReadyState state) {
   DCHECK(main_render_thread_checker_.CalledOnValidThread());
   for (auto* sink : sinks_)
     sink->OnReadyStateChanged(state);
 }
 
 }  // namespace content