Create CanvasCaptureMediaStreamTrack in a regular MediaStream

content/public/renderer/media_stream_api.h

Index: content/public/renderer/media_stream_api.h
diff --git a/content/public/renderer/media_stream_api.h b/content/public/renderer/media_stream_api.h
index dfb2aaf6ea1161d61c513b8634dedc460f98df54..d82838fe9f2d5ed63f39279d4825913f33d60c94 100644
--- a/content/public/renderer/media_stream_api.h
+++ b/content/public/renderer/media_stream_api.h
@@ -11,6 +11,7 @@
 
 namespace blink {
 class WebMediaStream;
+class WebMediaStreamTrack;
 }
 
 namespace media {
@@ -49,6 +50,18 @@ CONTENT_EXPORT bool AddAudioTrackToMediaStream(
     bool is_readonly,
     blink::WebMediaStream* web_stream);
 
+// This method creates a WebMediaStreamSource + MediaStreamSource pair with the
+// provided VideoCapturerSource. A new MediaStreamTrack is created, holding the
+// previous MediaStreamSource, and is plugged into the track passed as
+// |web_track|.
+// |is_remote| should be true if the source of the data is not a local device.
+// |is_readonly| should be true if the format of the data cannot be changed by
+//     MediaTrackConstraints.
+CONTENT_EXPORT bool AddVideoCapturerSourceToVideoTrack(
+    scoped_ptr<media::VideoCapturerSource> source,
+    bool is_remote,
+    bool is_readonly,
+    blink::WebMediaStreamTrack* web_track);
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_API_H_