Add FlexfecReceiveStream.

webrtc/api/BUILD.gn

 # 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.
 
 import("../build/webrtc.gni")
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 }
 
 group("api") {
   public_deps = [
     ":libjingle_peerconnection",
   ]
 }
 
 rtc_source_set("call_api") {
   sources = [
     "call/audio_receive_stream.h",
     "call/audio_send_stream.h",
     "call/audio_sink.h",
     "call/audio_state.h",
+    "call/flexfec_receive_stream.h",
   ]
 
   deps = [
     # TODO(kjellander): Add remaining dependencies when webrtc:4243 is done.
     "..:webrtc_common",
     "../base:rtc_base_approved",
     "../modules/audio_coding:audio_encoder_interface",
   ]
 }
 
@@ skipping 427 matching lines @@
 
       shared_libraries = [ ":libjingle_peerconnection_so" ]
     }
 
     android_resources("libjingle_peerconnection_android_unittest_resources") {
       resource_dirs = [ "androidtests/res" ]
       custom_package = "org.webrtc"
     }
   }
 }