Pass around the candidate removals events in IOS clients

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.
  */
 
@@ skipping 215 matching lines @@
       ARDSignalingMessage *answer =
           [[ARDSessionDescriptionMessage alloc]
                initWithDescription:answerDescription];
       [self sendMessage:answer];
       break;
     }
     case kARDSignalingMessageTypeAnswer:
       // Should not receive answer in loopback scenario.
       break;
     case kARDSignalingMessageTypeCandidate:
+    case kARDSignalingMessageTypeCandidateRemoval:
       // Send back to server.
       [self sendMessage:message];
       break;
     case kARDSignalingMessageTypeBye:
       // Nothing to do.
       return;
   }
 }
 
 - (void)channel:(id<ARDSignalingChannel>)channel
     didChangeState:(ARDSignalingChannelState)state {
 }
 
 @end