Loopback mode for AppRTCDemo on iOS.

webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallViewController.m

 /*
  *  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 13 matching lines @@
 @end
 
 @implementation ARDVideoCallViewController {
   ARDAppClient *_client;
   RTCVideoTrack *_remoteVideoTrack;
   RTCVideoTrack *_localVideoTrack;
 }
 
 @synthesize videoCallView = _videoCallView;
 
-- (instancetype)initForRoom:(NSString *)room {
+- (instancetype)initForRoom:(NSString *)room
+                 isLoopback:(BOOL)isLoopback
+                isAudioOnly:(BOOL)isAudioOnly {
   if (self = [super init]) {
     _client = [[ARDAppClient alloc] initWithDelegate:self];
-    [_client connectToRoomWithId:room options:nil];
+    [_client connectToRoomWithId:room
+                      isLoopback:isLoopback
+                     isAudioOnly:isAudioOnly
+                         options:nil];
   }
   return self;
 }
 
 - (void)loadView {
   _videoCallView = [[ARDVideoCallView alloc] initWithFrame:CGRectZero];
   _videoCallView.delegate = self;
   _videoCallView.statusLabel.text =
       [self statusTextForState:RTCICEConnectionNew];
   self.view = _videoCallView;
@@ skipping 132 matching lines @@
 - (void)showAlertWithMessage:(NSString*)message {
   UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:nil
                                                       message:message
                                                      delegate:nil
                                             cancelButtonTitle:@"OK"
                                             otherButtonTitles:nil];
   [alertView show];
 }
 
 @end