ObjC: RTCVideoSource cleanup

webrtc/sdk/objc/Framework/Classes/RTCPeerConnectionFactory.mm

Index: webrtc/sdk/objc/Framework/Classes/RTCPeerConnectionFactory.mm
diff --git a/webrtc/sdk/objc/Framework/Classes/RTCPeerConnectionFactory.mm b/webrtc/sdk/objc/Framework/Classes/RTCPeerConnectionFactory.mm
index 9759269357c961377c2a9838485babb3a4e0e181..18a707cf4c9987062272925f7e5e0eff4d85cd9b 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCPeerConnectionFactory.mm
+++ b/webrtc/sdk/objc/Framework/Classes/RTCPeerConnectionFactory.mm
@@ -89,9 +89,9 @@
 }
 
 - (RTCVideoSource *)videoSource {
-  rtc::scoped_refptr<webrtc::ObjcVideoTrackSource> objc_video_track_source(
+  rtc::scoped_refptr<webrtc::ObjcVideoTrackSource> objcVideoTrackSource(
       new rtc::RefCountedObject<webrtc::ObjcVideoTrackSource>());
-  return [[RTCVideoSource alloc] initWithNativeVideoSource:objc_video_track_source];
+  return [[RTCVideoSource alloc] initWithNativeVideoSource:objcVideoTrackSource];
 }
 
 - (RTCVideoTrack *)videoTrackWithSource:(RTCVideoSource *)source