Update API for Objective-C RTCDataChannelConfiguration.

webrtc/api/api.gyp

 # Copyright (c) 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.
 
 {
   'includes': [ '../build/common.gypi', ],
@@ skipping 13 matching lines @@
             'objc/RTCAVFoundationVideoSource.mm',
             'objc/RTCAudioTrack+Private.h',
             'objc/RTCAudioTrack.h',
             'objc/RTCAudioTrack.mm',
             'objc/RTCConfiguration+Private.h',
             'objc/RTCConfiguration.h',
             'objc/RTCConfiguration.mm',
             'objc/RTCDataChannel+Private.h',
             'objc/RTCDataChannel.h',
             'objc/RTCDataChannel.mm',
+            'objc/RTCDataChannelConfiguration+Private.h',
+            'objc/RTCDataChannelConfiguration.h',
+            'objc/RTCDataChannelConfiguration.mm',
             'objc/RTCIceCandidate+Private.h',
             'objc/RTCIceCandidate.h',
             'objc/RTCIceCandidate.mm',
             'objc/RTCIceServer+Private.h',
             'objc/RTCIceServer.h',
             'objc/RTCIceServer.mm',
             'objc/RTCMediaConstraints+Private.h',
             'objc/RTCMediaConstraints.h',
             'objc/RTCMediaConstraints.mm',
             'objc/RTCMediaStream+Private.h',
@@ skipping 56 matching lines @@
           'xcode_settings': {
             'CLANG_ENABLE_OBJC_ARC': 'YES',
             'CLANG_WARN_OBJC_MISSING_PROPERTY_SYNTHESIS': 'YES',
             'GCC_PREFIX_HEADER': 'objc/WebRTC-Prefix.pch',
           },
         }
       ],
     }], # OS=="ios"
   ],
 }