Report if video capturing meets output protection requirement.

content/renderer/media/media_stream_video_track.h

Index: content/renderer/media/media_stream_video_track.h
diff --git a/content/renderer/media/media_stream_video_track.h b/content/renderer/media/media_stream_video_track.h
index 9769d3bb7f13f3749fa11f354917da9596a7dbc4..9547c3d829cb8b4c49620548fe20110fee4054f4 100644
--- a/content/renderer/media/media_stream_video_track.h
+++ b/content/renderer/media/media_stream_video_track.h
@@ -15,6 +15,7 @@
 #include "content/public/renderer/media_stream_video_sink.h"
 #include "content/renderer/media/media_stream_track.h"
 #include "content/renderer/media/media_stream_video_source.h"
+#include "content/renderer/media/secure_display_link_tracker.h"
 
 namespace content {
 
@@ -72,7 +73,8 @@ class CONTENT_EXPORT MediaStreamVideoTrack : public MediaStreamTrack {
   // store the callback. This is important to ensure that we can release
   // the callback on render thread without reference to it on the IO-thread.
   void AddSink(MediaStreamVideoSink* sink,
-               const VideoCaptureDeliverFrameCB& callback);
+               const VideoCaptureDeliverFrameCB& callback,
+               bool is_sink_secure);
   void RemoveSink(MediaStreamVideoSink* sink);
 
   std::vector<MediaStreamVideoSink*> sinks_;
@@ -89,6 +91,9 @@ class CONTENT_EXPORT MediaStreamVideoTrack : public MediaStreamTrack {
   // track.
   MediaStreamVideoSource* source_;
 
+  // This is used for tracking if all connected video sinks are secure.
+  SecureDisplayLinkTracker<MediaStreamVideoSink> secure_tracker_;
+
   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoTrack);
 };