Tweaks for new Objective-C API.

webrtc/api/objc/RTCPeerConnection.h

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 94 matching lines @@
 
 /** The object that will be notifed about events such as state changes and
  *  streams being added or removed.
  */
 @property(nonatomic, weak, nullable) id<RTCPeerConnectionDelegate> delegate;
 @property(nonatomic, readonly, nonnull) NSArray *localStreams;
 @property(nonatomic, readonly, nullable)
     RTCSessionDescription *localDescription;
 @property(nonatomic, readonly, nullable)
     RTCSessionDescription *remoteDescription;
-@property(nonatomic, readonly) RTCSignalingState signalingState;
-@property(nonatomic, readonly) RTCIceConnectionState iceConnectionState;
-@property(nonatomic, readonly) RTCIceGatheringState iceGatheringState;
+@property(nonatomic, assign, readonly) RTCSignalingState signalingState;

[tkchin_webrtc, 2016/02/26 00:45:25]

ditto no assign + readonly

+@property(nonatomic, assign, readonly) RTCIceConnectionState iceConnectionState;
+@property(nonatomic, assign, readonly) RTCIceGatheringState iceGatheringState;
 
 - (nonnull instancetype)init NS_UNAVAILABLE;
 
 /** Initialize an RTCPeerConnection with a configuration, constraints, and
  *  delegate.
  */
 - (nonnull instancetype)initWithFactory:
     (nonnull RTCPeerConnectionFactory *)factory
                           configuration:
     (nonnull RTCConfiguration *)configuration
@@ skipping 46 matching lines @@
     configuration:(nonnull RTCDataChannelConfiguration *)configuration;
 
 @end
 
 @interface RTCPeerConnection (Stats)
 
 /** Gather stats for the given RTCMediaStreamTrack. If |mediaStreamTrack| is nil
  *  statistics are gathered for all tracks.
  */
 - (void)statsForTrack:
-    (nonnull RTCMediaStreamTrack *)mediaStreamTrack
+    (nullable RTCMediaStreamTrack *)mediaStreamTrack
      statsOutputLevel:(RTCStatsOutputLevel)statsOutputLevel
     completionHandler:
     (nullable void (^)(NSArray * _Nonnull stats))completionHandler;
     // (nullable void (^)(NSArray<RTCStatsReport *> *stats))completionHandler;
 
 @end
 
 NS_ASSUME_NONNULL_END