RTCPeerConnectionInterface.mm createNativeConfiguration and other clean-up.

talk/app/webrtc/objc/RTCPeerConnection.mm

 /*
  * libjingle
  * Copyright 2013 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 193 matching lines @@
 - (void)setRemoteDescriptionWithDelegate:
             (id<RTCSessionDescriptionDelegate>)delegate
                       sessionDescription:(RTCSessionDescription*)sdp {
   rtc::scoped_refptr<webrtc::RTCSetSessionDescriptionObserver> observer(
       new rtc::RefCountedObject<webrtc::RTCSetSessionDescriptionObserver>(
           delegate, self));
   self.peerConnection->SetRemoteDescription(observer, sdp.sessionDescription);
 }
 
 - (BOOL)setConfiguration:(RTCConfiguration *)configuration {
-  return self.peerConnection->SetConfiguration(
-      configuration.nativeConfiguration);
+  std::unique_ptr<webrtc::PeerConnectionInterface::RTCConfiguration> config(
+      [configuration createNativeConfiguration]);
+  if (!config) {
+    return NO;
+  }
+  return self.peerConnection->SetConfiguration(*config);
 }
 
 - (RTCSessionDescription*)localDescription {
   const webrtc::SessionDescriptionInterface* sdi =
       self.peerConnection->local_description();
   return sdi ? [[RTCSessionDescription alloc] initWithSessionDescription:sdi]
              : nil;
 }
 
 - (NSArray*)localStreams {
@@ skipping 72 matching lines @@
     _delegate = delegate;
   }
   return self;
 }
 
 - (rtc::scoped_refptr<webrtc::PeerConnectionInterface>)peerConnection {
   return _peerConnection;
 }
 
 @end