GN: Add SDK tests to rtc_unittests.

webrtc/modules/video_coding/BUILD.gn

 # Copyright (c) 2014 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")
 
@@ skipping 166 matching lines @@
   source_set("webrtc_h264_video_toolbox") {
     sources = [
       "codecs/h264/h264_video_toolbox_decoder.cc",
       "codecs/h264/h264_video_toolbox_decoder.h",
       "codecs/h264/h264_video_toolbox_encoder.cc",
       "codecs/h264/h264_video_toolbox_encoder.h",
       "codecs/h264/h264_video_toolbox_nalu.cc",
       "codecs/h264/h264_video_toolbox_nalu.h",
     ]
 
-    configs += [ "//build/config/compiler:enable_arc" ]
-
-    cflags = [ "-Wobjc-missing-property-synthesis" ]
-
-    precompiled_header = "../../sdk/objc/WebRTC-Prefix.pch"
-    precompiled_source = "../../sdk/objc/WebRTC-Prefix.pch"
+    configs += [
+      "../..:common_objc",
+      "//build/config/compiler:enable_arc",
+    ]
 
     deps = [
       "../../sdk:rtc_sdk_common_objc",
     ]
 
     libs = [
       "CoreFoundation.framework",
       "CoreMedia.framework",
       "CoreVideo.framework",
       "VideoToolbox.framework",
@@ skipping 100 matching lines @@
 
   deps = [
     ":video_coding_utility",
     "../../common_video",
     "../../system_wrappers",
   ]
   if (rtc_build_libvpx) {
     deps += [ rtc_libvpx_dir ]
   }
 }