Add RTCFileVideoCapturer class.

webrtc/sdk/BUILD.gn

 # 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.
 
 import("../webrtc.gni")
 if (is_ios) {
@@ skipping 273 matching lines @@
         "objc/Framework/Headers/WebRTC/RTCSSLAdapter.h",
         "objc/Framework/Headers/WebRTC/RTCSessionDescription.h",
         "objc/Framework/Headers/WebRTC/RTCTracing.h",
         "objc/Framework/Headers/WebRTC/RTCVideoCapturer.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",
         "objc/Framework/Headers/WebRTC/RTCVideoViewShading.h",
       ]
-
+      if (is_ios) {
+        sources += [
+          "objc/Framework/Classes/PeerConnection/RTCFileVideoCapturer.h",
+          "objc/Framework/Classes/PeerConnection/RTCFileVideoCapturer.m",
+        ]
+      }
       libs = [ "AVFoundation.framework" ]
 
       if (is_ios) {
         libs += [ "CoreGraphics.framework" ]
       }
 
       configs += [ "..:common_objc" ]
 
       public_configs = [ ":objc_common_config" ]
 
@@ skipping 245 matching lines @@
         public_deps = [
           "$rtc_libyuv_dir",
         ]
       } else {
         # Need to add a directory normally exported by libyuv.
         include_dirs = [ "$rtc_libyuv_dir/include" ]
       }
     }
   }
 }