Mark public ObjC APIs as explicitly visible.
BUG=
Review URL: https://codereview.webrtc.org/1899573002
Cr-Commit-Position: refs/heads/master@{#12431}
diff --git a/webrtc/api/objc/RTCAudioTrack.h b/webrtc/api/objc/RTCAudioTrack.h
index b5ea649..0f4b69d 100644
--- a/webrtc/api/objc/RTCAudioTrack.h
+++ b/webrtc/api/objc/RTCAudioTrack.h
@@ -9,9 +9,11 @@
*/
#import "webrtc/api/objc/RTCMediaStreamTrack.h"
+#import "webrtc/base/objc/RTCMacros.h"
NS_ASSUME_NONNULL_BEGIN
+RTC_EXPORT
@interface RTCAudioTrack : RTCMediaStreamTrack
- (instancetype)init NS_UNAVAILABLE;