Reland of GN: Enable ARC for Mac and iOS in rtc_* templates

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 32 matching lines @@
       "objc/Framework/Classes/helpers.mm",
       "objc/Framework/Headers/WebRTC/RTCDispatcher.h",
       "objc/Framework/Headers/WebRTC/RTCFieldTrials.h",
       "objc/Framework/Headers/WebRTC/RTCLogging.h",
       "objc/Framework/Headers/WebRTC/RTCMacros.h",
       "objc/Framework/Headers/WebRTC/RTCMetrics.h",
       "objc/Framework/Headers/WebRTC/RTCMetricsSampleInfo.h",
       "objc/Framework/Headers/WebRTC/RTCSSLAdapter.h",
       "objc/Framework/Headers/WebRTC/RTCTracing.h",
     ]
-    configs += [
-      "..:common_objc",
-      "//build/config/compiler:enable_arc",
-    ]
-    public_configs = [ ":rtc_sdk_common_objc_config" ]
     deps = [
       "../base:rtc_base",
     ]
+    configs += [ "..:common_objc" ]
+
+    public_configs = [ ":rtc_sdk_common_objc_config" ]
     if (is_ios) {
       sources += [
         "objc/Framework/Classes/RTCCameraPreviewView.m",
         "objc/Framework/Classes/RTCUIApplication.h",
         "objc/Framework/Classes/RTCUIApplication.mm",
         "objc/Framework/Classes/UIDevice+RTCDevice.mm",
         "objc/Framework/Headers/WebRTC/RTCCameraPreviewView.h",
         "objc/Framework/Headers/WebRTC/UIDevice+RTCDevice.h",
       ]
       if (current_cpu == "arm64") {
@@ skipping 117 matching lines @@
       "objc/Framework/Headers/WebRTC/RTCRtpReceiver.h",
       "objc/Framework/Headers/WebRTC/RTCRtpSender.h",
       "objc/Framework/Headers/WebRTC/RTCSessionDescription.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",
     ]
 
-    configs += [
-      "..:common_objc",
-      "//build/config/compiler:enable_arc",
-    ]
-
-    public_configs = [ ":rtc_sdk_common_objc_config" ]
-
     deps = [
       ":webrtc_h264_video_toolbox",
       "../api:video_frame_api",
       "../base:rtc_base",
       "../base:rtc_base_approved",
       "../common_video",
       "../media:rtc_media",
       "../media:rtc_media_base",
       "../system_wrappers",
     ]
@@ skipping 23 matching lines @@
       ]
       libs = [
         "CoreVideo.framework",
         "CoreMedia.framework",
         "OpenGL.framework",
         "Metal.framework",
         "MetalKit.framework",
       ]
     }
 
+    configs += [ "..:common_objc" ]
+
+    public_configs = [ ":rtc_sdk_common_objc_config" ]
+
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
 
     libs += [ "AVFoundation.framework" ]
 
     deps += [
       ":rtc_sdk_common_objc",
       "../pc:libjingle_peerconnection",
@@ skipping 103 matching lines @@
         sources += [ "objc/Framework/Headers/WebRTC/RTCFileLogger.h" ]
         public_headers += [ "objc/Framework/Headers/WebRTC/RTCFileLogger.h" ]
       }
 
       ldflags = [
         "-all_load",
         "-install_name",
         "@rpath/$output_name.framework/$output_name",
       ]
 
-      configs += [
-        "..:common_objc",
-        "//build/config/compiler:enable_arc",
-      ]
-
-      public_configs = [ ":rtc_sdk_common_objc_config" ]
-
       deps = [
         ":rtc_sdk_peerconnection_objc",
         "../system_wrappers:field_trial_default",
         "../system_wrappers:metrics_default",
       ]
 
       libs = [
         "AVFoundation.framework",
         "AudioToolbox.framework",
         "CoreGraphics.framework",
         "CoreMedia.framework",
         "GLKit.framework",
         "VideoToolbox.framework",
       ]
 
+      configs += [ "..:common_objc" ]
+
+      public_configs = [ ":rtc_sdk_common_objc_config" ]
+
       if (!build_with_chromium && is_clang) {
         # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163)
         configs -= [ "//build/config/clang:find_bad_constructs" ]
       }
     }
   }
 
   rtc_static_library("rtc_sdk_objc") {
     complete_static_lib = true
     deps = [
       ":rtc_sdk_peerconnection_objc",
       "//webrtc/system_wrappers:field_trial_default",
       "//webrtc/system_wrappers:metrics_default",
     ]
   }
 
   rtc_static_library("webrtc_h264_video_toolbox") {
     sources = [
       "objc/Framework/Classes/h264_video_toolbox_decoder.cc",
       "objc/Framework/Classes/h264_video_toolbox_decoder.h",
       "objc/Framework/Classes/h264_video_toolbox_encoder.h",
       "objc/Framework/Classes/h264_video_toolbox_encoder.mm",
       "objc/Framework/Classes/h264_video_toolbox_nalu.cc",
       "objc/Framework/Classes/h264_video_toolbox_nalu.h",
     ]
 
-    configs += [
-      "//webrtc:common_objc",
-      "//build/config/compiler:enable_arc",
-    ]
+    configs += [ "//webrtc:common_objc" ]
 
     deps = [
       ":rtc_sdk_common_objc",
       "../api:video_frame_api",
       "../base:rtc_base_approved",
       "../common_video",
       "../media:rtc_media_base",
       "../modules/video_coding:video_coding_utility",
       "../modules/video_coding:webrtc_h264",
       "../system_wrappers",
@@ skipping 15 matching lines @@
       deps += [ "$rtc_libyuv_dir" ]
       public_deps = [
         "$rtc_libyuv_dir",
       ]
     } else {
       # Need to add a directory normally exported by libyuv.
       include_dirs = [ "$rtc_libyuv_dir/include" ]
     }
   }
 }