Tweaks for new Objective-C API.
BUG=
Review URL: https://codereview.webrtc.org/1696673003
Cr-Commit-Position: refs/heads/master@{#11872}
diff --git a/webrtc/api/objc/RTCPeerConnection.h b/webrtc/api/objc/RTCPeerConnection.h
index 86668a5..72645b5 100644
--- a/webrtc/api/objc/RTCPeerConnection.h
+++ b/webrtc/api/objc/RTCPeerConnection.h
@@ -181,7 +181,7 @@
* statistics are gathered for all tracks.
*/
- (void)statsForTrack:
- (nonnull RTCMediaStreamTrack *)mediaStreamTrack
+ (nullable RTCMediaStreamTrack *)mediaStreamTrack
statsOutputLevel:(RTCStatsOutputLevel)statsOutputLevel
completionHandler:
(nullable void (^)(NSArray * _Nonnull stats))completionHandler;