iOS AppRTC: First unit test.

Tests basic session ICE connection by stubbing out network components, which have been refactored to faciliate testing.

BUG=3994
R=jiayl@webrtc.org, kjellander@webrtc.org, phoglund@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/28349004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@8002 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/talk/examples/objc/AppRTCDemo/ARDAppClient.h b/talk/examples/objc/AppRTCDemo/ARDAppClient.h
index d742ea3..fa3a634 100644
--- a/talk/examples/objc/AppRTCDemo/ARDAppClient.h
+++ b/talk/examples/objc/AppRTCDemo/ARDAppClient.h
@@ -45,6 +45,9 @@
     didChangeState:(ARDAppClientState)state;
 
 - (void)appClient:(ARDAppClient *)client
+    didChangeConnectionState:(RTCICEConnectionState)state;
+
+- (void)appClient:(ARDAppClient *)client
     didReceiveLocalVideoTrack:(RTCVideoTrack *)localVideoTrack;
 
 - (void)appClient:(ARDAppClient *)client