Update API for Objective-C RTCPeerConnection.

webrtc/api/objc/RTCPeerConnectionDelegate.h

Index: webrtc/api/objc/RTCPeerConnectionDelegate.h
diff --git a/webrtc/api/objc/RTCPeerConnectionDelegate.h b/webrtc/api/objc/RTCPeerConnectionDelegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..34d11075e0eab16fc2684a33ebcf0f479b3a0790
--- /dev/null
+++ b/webrtc/api/objc/RTCPeerConnectionDelegate.h
@@ -0,0 +1,86 @@
+/*
+ *  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.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import "webrtc/api/objc/RTCPeerConnection.h"
+
+@class RTCDataChannel;
+@class RTCIceCandidate;
+@class RTCMediaStream;
+@class RTCPeerConnection;
+
+/** Represents the signaling state of the peer connection. */
+typedef NS_ENUM(NSInteger, RTCSignalingState) {
+  RTCSignalingStateStable,
+  RTCSignalingStateHaveLocalOffer,
+  RTCSignalingStateHaveLocalPrAnswer,
+  RTCSignalingStateHaveRemoteOffer,
+  RTCSignalingStateHaveRemotePrAnswer,
+  RTCSignalingStateClosed,
+};
+
+/** Represents the ice connection state of the peer connection. */
+typedef NS_ENUM(NSInteger, RTCIceConnectionState) {
+  RTCIceConnectionStateNew,
+  RTCIceConnectionStateChecking,
+  RTCIceConnectionStateConnected,
+  RTCIceConnectionStateCompleted,
+  RTCIceConnectionStateFailed,
+  RTCIceConnectionStateDisconnected,
+  RTCIceConnectionStateClosed,
+  RTCIceConnectionStateMax,
+};
+
+/** Represents the ice gathering state of the peer connection. */
+typedef NS_ENUM(NSInteger, RTCIceGatheringState) {
+  RTCIceGatheringStateNew,
+  RTCIceGatheringStateGathering,
+  RTCIceGatheringStateComplete,
+};
+
+NS_ASSUME_NONNULL_BEGIN
+
+@protocol RTCPeerConnectionDelegate<NSObject>

[tkchin_webrtc, 2016/02/01 10:00:02]

space after protocol name
Delegate <NSObject>

[hjon_webrtc, 2016/02/04 00:58:38]

Done.

+
+/** Triggered when the SignalingState changed. */

[tkchin_webrtc, 2016/02/01 10:00:02]

nit: Triggered is a weird word. Called when the SignalingState changes?

[hjon_webrtc, 2016/02/04 00:58:38]

Done.

+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+ signalingStateChanged:(RTCSignalingState)stateChanged;

[tkchin_webrtc, 2016/02/01 10:00:02]

minimum 4 spaces from left (break the : alignment)

[hjon_webrtc, 2016/02/04 00:58:38]

Done.

+
+/** Triggered when media is received on a new stream from remote peer. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+           addedStream:(RTCMediaStream *)stream;
+
+/** Triggered when a remote peer closes a stream. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+         removedStream:(RTCMediaStream *)stream;
+
+/** Triggered when renegotiation is needed, for example ICE has restarted. */
+- (void)peerConnectionNeedsRenegotiation:(RTCPeerConnection *)peerConnection;
+
+/** Called any time the IceConnectionState changes. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+    iceConnectionStateChanged:(RTCIceConnectionState)newState;
+
+/** Called any time the IceGatheringState changes. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+    iceGatheringStateChanged:(RTCIceGatheringState)newState;
+
+/** New ice candidate has been found. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+  receivedIceCandidate:(RTCIceCandidate *)candidate;

[tkchin_webrtc, 2016/02/01 10:00:02]

ditto

[hjon_webrtc, 2016/02/04 00:58:38]

Done.

+
+/** New data channel has been opened. */
+- (void)peerConnection:(RTCPeerConnection *)peerConnection
+    didOpenDataChannel:(RTCDataChannel *)dataChannel;
+
+@end
+
+NS_ASSUME_NONNULL_END