Remove dep on system_wrappers for apprtc and use only framework.

webrtc/examples/BUILD.gn

 # Copyright (c) 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_android) {
@@ skipping 144 matching lines @@
   }
 
   rtc_static_library("apprtc_common") {
     testonly = true
     sources = [
       "objc/AppRTCMobile/common/ARDUtilities.h",
       "objc/AppRTCMobile/common/ARDUtilities.m",
     ]
     public_configs = [ ":apprtc_common_config" ]
 
-    deps = [
-      "../system_wrappers:field_trial_default",
-      "../system_wrappers:metrics_default",
-    ]
     if (is_ios) {
-      deps += [ ":AppRTCMobile_ios_frameworks" ]
+      deps = [
+        ":AppRTCMobile_ios_frameworks",
+      ]
     } else {
-      deps += [ "../sdk:objc_common" ]
+      deps = [
+        "../sdk:objc_common",
+        "../system_wrappers:field_trial_default",
+        "../system_wrappers:metrics_default",
+      ]
     }
   }
 
   config("apprtc_signaling_config") {
     include_dirs = [ "objc/AppRTCMobile" ]
 
     # GN orders flags on a target before flags from configs. The default config
     # adds these flags so to cancel them out they need to come from a config and
     # cannot be on the target directly.
     cflags = [
@@ skipping 519 matching lines @@
 
     deps = [
       "../p2p:libstunprober",
       "../p2p:rtc_p2p",
       "../rtc_base:rtc_base",
       "../rtc_base:rtc_base_approved",
       "../system_wrappers:field_trial_default",
     ]
   }
 }