Report if video capturing meets output protection requirement.

content/public/renderer/media_stream_video_sink.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_VIDEO_SINK_H_
 #define CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_VIDEO_SINK_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
@@ skipping 23 matching lines @@
   // is destroyed, DisconnectFromTrack must be called. This MediaStreamVideoSink
   // base class holds a reference to the WebMediaStreamTrack until
   // DisconnectFromTrack is called.
   //
   // Calls to these methods must be done on the main render thread.
   // Note that |callback| for frame delivery happens on the IO thread.
   //
   // Warning: Calling DisconnectFromTrack does not immediately stop frame
   // delivery through the |callback|, since frames are being delivered on a
   // different thread.
+  //
+  // |is_sink_secure| indicates if this MediaStreamVideoSink is secure (i.e.
+  // meets output protection requirement).

[miu, 2016/04/26 01:25:13]

nit: Consider adding a cautionary comment like: "Generally, this should be false
unless you know what you are doing."

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

Done.

   void ConnectToTrack(const blink::WebMediaStreamTrack& track,
-                      const VideoCaptureDeliverFrameCB& callback);
+                      const VideoCaptureDeliverFrameCB& callback,
+                      bool is_sink_secure);
   void DisconnectFromTrack();
 
   // Returns the currently-connected track, or a null instance otherwise.
   const blink::WebMediaStreamTrack& connected_track() const {
     return connected_track_;
   }
 
  private:
   // Set by ConnectToTrack() and cleared by DisconnectFromTrack().
   blink::WebMediaStreamTrack connected_track_;
 };
 
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_VIDEO_SINK_H_