Report if video capturing meets output protection requirement.

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 211 matching lines @@
 MediaStreamVideoTrack::MediaStreamVideoTrack(
     MediaStreamVideoSource* source,
     const blink::WebMediaConstraints& constraints,
     const MediaStreamVideoSource::ConstraintsCallback& callback,
     bool enabled)
     : MediaStreamTrack(true),
       frame_deliverer_(
           new MediaStreamVideoTrack::FrameDeliverer(source->io_task_runner(),
                                                     enabled)),
       constraints_(constraints),
-      source_(source) {
+      source_(source),
+      secure_tracker_(new CapturingLinkSecureTracker<MediaStreamVideoSink>()) {
   DCHECK(!constraints.isNull());
   source->AddTrack(this,
                    base::Bind(
                        &MediaStreamVideoTrack::FrameDeliverer::DeliverFrameOnIO,
                        frame_deliverer_),
                    constraints, callback);
 }
 
 MediaStreamVideoTrack::~MediaStreamVideoTrack() {
   DCHECK(main_render_thread_checker_.CalledOnValidThread());
   DCHECK(sinks_.empty());
   Stop();
   DVLOG(3) << "~MediaStreamVideoTrack()";
 }
 
-void MediaStreamVideoTrack::AddSink(
-    MediaStreamVideoSink* sink, const VideoCaptureDeliverFrameCB& callback) {
+void MediaStreamVideoTrack::AddSink(MediaStreamVideoSink* sink,
+                                    const VideoCaptureDeliverFrameCB& callback,
+                                    bool is_sink_secure) {
   DCHECK(main_render_thread_checker_.CalledOnValidThread());
   DCHECK(std::find(sinks_.begin(), sinks_.end(), sink) == sinks_.end());
   sinks_.push_back(sink);
   frame_deliverer_->AddCallback(sink, callback);
+  secure_tracker_->AddLinkSecure(sink, is_sink_secure);
   // Request source to deliver a frame because a new sink is added.
-  if (source_)
+  if (source_) {
     source_->RequestRefreshFrame();
+    source_->UpdateCapturingLinkSecure(this,
+                                       secure_tracker_->is_capturing_secure());
+  }
 }
 
 void MediaStreamVideoTrack::RemoveSink(MediaStreamVideoSink* sink) {
   DCHECK(main_render_thread_checker_.CalledOnValidThread());
   std::vector<MediaStreamVideoSink*>::iterator it =
       std::find(sinks_.begin(), sinks_.end(), sink);
   DCHECK(it != sinks_.end());
   sinks_.erase(it);
   frame_deliverer_->RemoveCallback(sink);
+  secure_tracker_->RemoveLinkSecure(sink);
+  if (source_)
+    source_->UpdateCapturingLinkSecure(this,
+                                       secure_tracker_->is_capturing_secure());
 }
 
 void MediaStreamVideoTrack::SetEnabled(bool enabled) {
   DCHECK(main_render_thread_checker_.CalledOnValidThread());
   frame_deliverer_->SetEnabled(enabled);
   for (auto* sink : sinks_)
     sink->OnEnabledChanged(enabled);
 }
 
 void MediaStreamVideoTrack::Stop() {
   DCHECK(main_render_thread_checker_.CalledOnValidThread());
   if (source_) {
     source_->RemoveTrack(this);
     source_ = NULL;
   }
   OnReadyStateChanged(blink::WebMediaStreamSource::ReadyStateEnded);
 }
 
 void MediaStreamVideoTrack::OnReadyStateChanged(
     blink::WebMediaStreamSource::ReadyState state) {
   DCHECK(main_render_thread_checker_.CalledOnValidThread());
   for (auto* sink : sinks_)
     sink->OnReadyStateChanged(state);
 }
 
 }  // namespace content