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

webrtc/examples/objc/AppRTCDemo/ARDSDPUtils.m

Index: webrtc/examples/objc/AppRTCDemo/ARDSDPUtils.m
diff --git a/webrtc/examples/objc/AppRTCDemo/ARDSDPUtils.m b/webrtc/examples/objc/AppRTCDemo/ARDSDPUtils.m
index 498a0015112e7de94f4cb35a3caf878aa48f7ced..be93ae26f81ac2e341f7849c411db41d9e4b53c3 100644
--- a/webrtc/examples/objc/AppRTCDemo/ARDSDPUtils.m
+++ b/webrtc/examples/objc/AppRTCDemo/ARDSDPUtils.m
@@ -10,15 +10,15 @@
 
 #import "ARDSDPUtils.h"
 
-#import "RTCLogging.h"
-#import "RTCSessionDescription.h"
+#import "webrtc/api/objc/RTCSessionDescription.h"
+#import "webrtc/base/objc/RTCLogging.h"
 
 @implementation ARDSDPUtils
 
 + (RTCSessionDescription *)
     descriptionForDescription:(RTCSessionDescription *)description
           preferredVideoCodec:(NSString *)codec {
-  NSString *sdpString = description.description;
+  NSString *sdpString = description.sdp;
   NSString *lineSeparator = @"\n";
   NSString *mLineSeparator = @" ";
   // Copied from PeerConnectionClient.java.