Update iOS AppRTCDemo to use the updated Objective-C API.

webrtc/examples/objc/AppRTCDemo/mac/APPRTCViewController.m

 /*
  *  Copyright 2014 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 "APPRTCViewController.h"
 
 #import <AVFoundation/AVFoundation.h>
+#import "webrtc/api/objc/RTCNSGLVideoView.h"
+#import "webrtc/api/objc/RTCVideoTrack.h"
+
 #import "ARDAppClient.h"
-#import "RTCNSGLVideoView.h"
-#import "RTCVideoTrack.h"
 
 static NSUInteger const kContentWidth = 1280;
 static NSUInteger const kContentHeight = 720;
 static NSUInteger const kRoomFieldWidth = 80;
 static NSUInteger const kLogViewHeight = 280;
 
 @class APPRTCMainView;
 @protocol APPRTCMainViewDelegate
 
 - (void)appRTCMainView:(APPRTCMainView*)mainView
@@ skipping 216 matching lines @@
       break;
     case kARDAppClientStateDisconnected:
       NSLog(@"Client disconnected.");
       [self resetUI];
       _client = nil;
       break;
   }
 }
 
 - (void)appClient:(ARDAppClient *)client
-    didChangeConnectionState:(RTCICEConnectionState)state {
+    didChangeConnectionState:(RTCIceConnectionState)state {
 }
 
 - (void)appClient:(ARDAppClient *)client
     didReceiveLocalVideoTrack:(RTCVideoTrack *)localVideoTrack {
   _localVideoTrack = localVideoTrack;
 }
 
 - (void)appClient:(ARDAppClient *)client
     didReceiveRemoteVideoTrack:(RTCVideoTrack *)remoteVideoTrack {
   _remoteVideoTrack = remoteVideoTrack;
@@ skipping 37 matching lines @@
   _remoteVideoTrack = nil;
   [self.mainView.remoteVideoView renderFrame:nil];
 }
 
 - (void)disconnect {
   [self resetUI];
   [_client disconnect];
 }
 
 @end