Add a webrtc{en,de}coderfactory implementation for VideoToolbox

webrtc/modules/video_coding/codecs/h264/h264.gypi

 # 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',
   ],
   'targets': [
     {
       'target_name': 'webrtc_h264',
       'type': 'static_library',
       'conditions': [
-        ['OS=="ios"', {
-          'dependencies': [
-            'webrtc_h264_video_toolbox',
-          ],
-          'sources': [
-            'h264_objc.mm',
-          ],
-        }],
         # TODO(hbos): Consider renaming this flag and the below macro to
         # something which helps distinguish OpenH264/FFmpeg from other H264
         # implementations.
         ['rtc_use_h264==1', {
           'defines': [
             'WEBRTC_USE_H264',
           ],
           'conditions': [
             ['rtc_initialize_ffmpeg==1', {
               'defines': [
@@ skipping 13 matching lines @@
             'h264_encoder_impl.h',
           ],
         }],
       ],
       'sources': [
         'h264.cc',
         'include/h264.h',
       ],
     }, # webrtc_h264
   ],
-  'conditions': [
-    ['OS=="ios"', {
-      'targets': [
-        {
-          'target_name': 'webrtc_h264_video_toolbox',
-          'type': 'static_library',
-          'includes': [ '../../../../build/objc_common.gypi' ],
-          'dependencies': [
-            '<(webrtc_root)/sdk/sdk.gyp:rtc_sdk_common_objc',
-          ],
-          'link_settings': {
-            'xcode_settings': {
-              'OTHER_LDFLAGS': [
-                '-framework CoreFoundation',
-                '-framework CoreMedia',
-                '-framework CoreVideo',
-                '-framework VideoToolbox',
-              ],
-            },
-          },
-          'sources': [
-            'h264_video_toolbox_decoder.cc',
-            'h264_video_toolbox_decoder.h',
-            'h264_video_toolbox_encoder.h',
-            'h264_video_toolbox_encoder.mm',
-            'h264_video_toolbox_nalu.cc',
-            'h264_video_toolbox_nalu.h',
-          ],
-          'conditions': [
-            ['build_libyuv==1', {
-              'dependencies': ['<(DEPTH)/third_party/libyuv/libyuv.gyp:libyuv'],
-            }],
-          ],
-        }, # webrtc_h264_video_toolbox
-      ], # targets
-    }], # OS=="ios"
-  ], # conditions
 }