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

webrtc/examples/objc/AppRTCDemo/ARDWebSocketChannel.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 "ARDWebSocketChannel.h"
 
-#import "RTCLogging.h"
+#import "webrtc/base/objc/RTCLogging.h"
 #import "SRWebSocket.h"
 
 #import "ARDSignalingMessage.h"
 #import "ARDUtilities.h"
 
 // TODO(tkchin): move these to a configuration object.
 static NSString const *kARDWSSMessageErrorKey = @"error";
 static NSString const *kARDWSSMessagePayloadKey = @"msg";
 
 @interface ARDWebSocketChannel () <SRWebSocketDelegate>
@@ skipping 187 matching lines @@
 #pragma mark - ARDSignalingChannelDelegate
 
 - (void)channel:(id<ARDSignalingChannel>)channel
     didReceiveMessage:(ARDSignalingMessage *)message {
   switch (message.type) {
     case kARDSignalingMessageTypeOffer: {
       // Change message to answer, send back to server.
       ARDSessionDescriptionMessage *sdpMessage =
           (ARDSessionDescriptionMessage *)message;
       RTCSessionDescription *description = sdpMessage.sessionDescription;
-      NSString *dsc = description.description;
+      NSString *dsc = description.sdp;
       dsc = [dsc stringByReplacingOccurrencesOfString:@"offer"
                                            withString:@"answer"];
       RTCSessionDescription *answerDescription =
-          [[RTCSessionDescription alloc] initWithType:@"answer" sdp:dsc];
+          [[RTCSessionDescription alloc] initWithType:RTCSdpTypeAnswer sdp:dsc];
       ARDSignalingMessage *answer =
           [[ARDSessionDescriptionMessage alloc]
                initWithDescription:answerDescription];
       [self sendMessage:answer];
       break;
     }
     case kARDSignalingMessageTypeAnswer:
       // Should not receive answer in loopback scenario.
       break;
     case kARDSignalingMessageTypeCandidate:
       // Send back to server.
       [self sendMessage:message];
       break;
     case kARDSignalingMessageTypeBye:
       // Nothing to do.
       return;
   }
 }
 
 - (void)channel:(id<ARDSignalingChannel>)channel
     didChangeState:(ARDSignalingChannelState)state {
 }
 
 @end