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

webrtc/examples/objc/AppRTCDemo/ARDSDPUtils.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.
  */
 
 #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.
   // TODO(tkchin): Move this to a shared C++ file.
   NSMutableArray *lines =
       [NSMutableArray arrayWithArray:
           [sdpString componentsSeparatedByString:lineSeparator]];
   NSInteger mLineIndex = -1;
   NSString *codecRtpMap = nil;
   // a=rtpmap:<payload type> <encoding name>/<clock rate>
@@ skipping 51 matching lines @@
                      withObject:newMLine];
   } else {
     RTCLogWarning(@"Wrong SDP media description format: %@", lines[mLineIndex]);
   }
   NSString *mangledSdpString = [lines componentsJoinedByString:lineSeparator];
   return [[RTCSessionDescription alloc] initWithType:description.type
                                                  sdp:mangledSdpString];
 }
 
 @end