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

webrtc/examples/objc/AppRTCDemo/ARDAppClient.h

 /*
  *  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 <Foundation/Foundation.h>
 
-#import "RTCVideoTrack.h"
+#import "webrtc/api/objc/RTCPeerConnection.h"
+#import "webrtc/api/objc/RTCVideoTrack.h"

[hjon_webrtc, 2016/02/12 17:34:56]

Should all of these paths be absolute? That seemed to be what we did for the
updated API, but I'm not sure if the same style should be used here. From the
current libjingle_peerconnection_objc, it looked like I could also export a
setting for include directories, but I'm not sure which style to use?

 
 typedef NS_ENUM(NSInteger, ARDAppClientState) {
   // Disconnected from servers.
   kARDAppClientStateDisconnected,
   // Connecting to servers.
   kARDAppClientStateConnecting,
   // Connected to servers.
   kARDAppClientStateConnected,
 };
 
 @class ARDAppClient;
 // The delegate is informed of pertinent events and will be called on the
 // main queue.
 @protocol ARDAppClientDelegate <NSObject>
 
 - (void)appClient:(ARDAppClient *)client
     didChangeState:(ARDAppClientState)state;
 
 - (void)appClient:(ARDAppClient *)client
-    didChangeConnectionState:(RTCICEConnectionState)state;
+    didChangeConnectionState:(RTCIceConnectionState)state;
 
 - (void)appClient:(ARDAppClient *)client
     didReceiveLocalVideoTrack:(RTCVideoTrack *)localVideoTrack;
 
 - (void)appClient:(ARDAppClient *)client
     didReceiveRemoteVideoTrack:(RTCVideoTrack *)remoteVideoTrack;
 
 - (void)appClient:(ARDAppClient *)client
          didError:(NSError *)error;
 
@@ skipping 20 matching lines @@
 // If |isLoopback| is true, the call will connect to itself.
 // If |isAudioOnly| is true, video will be disabled for the call.
 - (void)connectToRoomWithId:(NSString *)roomId
                  isLoopback:(BOOL)isLoopback
                 isAudioOnly:(BOOL)isAudioOnly;
 
 // Disconnects from the AppRTC servers and any connected clients.
 - (void)disconnect;
 
 @end