VideoCapturerDelegate: Retrieve supported/in-use format(s) for constraint negotiation

content/renderer/media/media_stream_video_source.h

Index: content/renderer/media/media_stream_video_source.h
diff --git a/content/renderer/media/media_stream_video_source.h b/content/renderer/media/media_stream_video_source.h
index 1b9bad51d79f6ba32cd08cd401cabe8d4fa7e3e0..f897072265da62d18d22b23816f7e352d9edd57b 100644
--- a/content/renderer/media/media_stream_video_source.h
+++ b/content/renderer/media/media_stream_video_source.h
@@ -106,7 +106,7 @@ class CONTENT_EXPORT MediaStreamVideoSource
                                           int max_requested_height) = 0;
   void OnSupportedFormats(const media::VideoCaptureFormats& formats);
 
-  // An implementation must starts capture frames using the resolution in
+  // An implementation must start capture frames using the resolution in
   // |params|. When the source has started or the source failed to start
   // OnStartDone must be called. An implementation must call
   // DeliverVideoFrame with the captured frames.