Implement CVO for iOS capturer

webrtc/sdk/sdk.gyp

 # Copyright 2016 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': [
@@ skipping 171 matching lines @@
             'objc/Framework/Headers/WebRTC/RTCRtpReceiver.h',
             'objc/Framework/Headers/WebRTC/RTCRtpSender.h',
             'objc/Framework/Headers/WebRTC/RTCSessionDescription.h',
             'objc/Framework/Headers/WebRTC/RTCStatsReport.h',
             'objc/Framework/Headers/WebRTC/RTCVideoFrame.h',
             'objc/Framework/Headers/WebRTC/RTCVideoRenderer.h',
             'objc/Framework/Headers/WebRTC/RTCVideoSource.h',
             'objc/Framework/Headers/WebRTC/RTCVideoTrack.h',
           ], # sources
           'conditions': [
+            ['build_libyuv==1', {
+              'dependencies': ['<(DEPTH)/third_party/libyuv/libyuv.gyp:libyuv'],
+            }],
             ['OS=="ios"', {
               'sources': [
                 'objc/Framework/Classes/RTCEAGLVideoView.m',
                 'objc/Framework/Classes/RTCNativeNV12Shader.mm',
                 'objc/Framework/Headers/WebRTC/RTCEAGLVideoView.h',
               ],
               'link_settings': {
                 'xcode_settings': {
                   'OTHER_LDFLAGS': [
                     '-framework CoreGraphics',
@@ skipping 120 matching lines @@
               'mac_framework_headers!': [
                 'objc/Framework/Headers/WebRTC/RTCFileLogger.h',
               ],
             }],
           ],  # conditions
         }, # rtc_sdk_framework_objc
       ],  # targets
     }],  # OS=="ios" or (OS=="mac" and mac_deployment_target=="10.7")
   ],
 }