Report if video capturing meets output protection requirement.

content/renderer/media/media_stream_video_source.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/non_thread_safe.h"
 #include "content/common/content_export.h"
 #include "content/common/media/video_capture.h"
 #include "content/public/renderer/media_stream_video_sink.h"
+#include "content/renderer/media/capturing_link_secure_tracker.h"
 #include "content/renderer/media/media_stream_source.h"
 #include "media/base/video_capture_types.h"
 #include "media/base/video_frame.h"
 #include "third_party/WebKit/public/platform/WebMediaConstraints.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamSource.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
 
 namespace content {
 
 class MediaStreamVideoTrack;
@@ skipping 45 matching lines @@
   static MediaStreamVideoSource* GetVideoSource(
       const blink::WebMediaStreamSource& source);
 
   // Puts |track| in the registered tracks list.
   void AddTrack(MediaStreamVideoTrack* track,
                 const VideoCaptureDeliverFrameCB& frame_callback,
                 const blink::WebMediaConstraints& constraints,
                 const ConstraintsCallback& callback);
   void RemoveTrack(MediaStreamVideoTrack* track);
 
+  void UpdateCapturingLinkSecure(MediaStreamVideoTrack* track, bool is_secure);
+
   // Return true if |name| is a constraint supported by MediaStreamVideoSource.
   static bool IsConstraintSupported(const std::string& name);
 
   // Request underlying source to capture a new frame.
   virtual void RequestRefreshFrame() {}
 
+  // Notify underlying source if the capturing link is secure.
+  virtual void SetCapturingLinkSecured(bool is_secure) {}
+
   // Returns the task runner where video frames will be delivered on.
   base::SingleThreadTaskRunner* io_task_runner() const;
 
   const media::VideoCaptureFormat* GetCurrentFormat() const;
 
  protected:
   void DoStopSource() override;
 
   // Sets ready state and notifies the ready state to all registered tracks.
   virtual void SetReadyState(blink::WebMediaStreamSource::ReadyState state);
@@ skipping 80 matching lines @@
   std::vector<TrackDescriptor> track_descriptors_;
 
   media::VideoCaptureFormats supported_formats_;
 
   // |track_adapter_| delivers video frames to the tracks on the IO-thread.
   const scoped_refptr<VideoTrackAdapter> track_adapter_;
 
   // Tracks that currently are connected to this source.
   std::vector<MediaStreamVideoTrack*> tracks_;
 
+  // This is used for tracking if all connected video sinks are secure.
+  std::unique_ptr<CapturingLinkSecureTracker<MediaStreamVideoTrack>>

[miu, 2016/04/26 01:25:14]

Please remove the indirection here.

[xjz, 2016/04/29 00:11:42]

Done.

+      secure_tracker_;
+
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<MediaStreamVideoSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_