Decoupling rtc_base from apple specific code [without cyclic deps]

webrtc/rtc_tools/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("//third_party/protobuf/proto_library.gni")
 import("../webrtc.gni")
@@ skipping 159 matching lines @@
     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" ]
     }
 
     deps = [
       "../modules/audio_device",
       "../system_wrappers:system_wrappers_default",
       "//build/win:default_exe_manifest",
     ]
+    if (is_ios) {
+      deps += [ "../rtc_base:rtc_base_apple" ]
+    }
   }
 }
 
 if (rtc_enable_protobuf) {
   proto_library("chart_proto") {
     sources = [
       "event_log_visualizer/chart.proto",
     ]
     proto_out_dir = "webrtc/rtc_tools/event_log_visualizer"
   }
@@ skipping 52 matching lines @@
         suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
       }
 
       defines = [ "ENABLE_RTC_EVENT_LOG" ]
       deps = [
         ":event_log_visualizer_utils",
         "../base:rtc_base_approved",
         "../test:field_trial",
         "../test:test_support",
       ]
+      if (is_ios) {
+        deps += [ "../rtc_base:rtc_base_apple" ]
+      }
     }
   }
 
   rtc_executable("activity_metric") {
     testonly = true
     sources = [
       "agc/activity_metric.cc",
     ]
 
     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" ]
     }
 
     deps = [
       "../base:rtc_base_approved",
       "../modules:module_api",
       "../modules/audio_processing",
       "../system_wrappers:metrics_default",
       "../test:test_support",
       "//build/win:default_exe_manifest",
       "//testing/gtest",
     ]
+
+    if (is_ios) {
+      deps += [ "../rtc_base:rtc_base_apple" ]
+    }
   }
 
   tools_unittests_resources = [
     "../../resources/foreman_cif.yuv",
     "../../resources/reference_less_video_test_file.y4m",
     "../../resources/video_quality_analysis_frame.txt",
   ]
 
   if (is_ios) {
     bundle_data("tools_unittests_bundle_data") {
@@ skipping 37 matching lines @@
     }
 
     data = tools_unittests_resources
     if (is_android) {
       deps += [ "//testing/android/native_test:native_test_support" ]
       shard_timeout = 900
     }
     if (is_ios) {
       deps += [ ":tools_unittests_bundle_data" ]
     }
+    if (is_ios || is_mac) {
+      deps += [ "../rtc_base:rtc_base_apple" ]
+    }
   }
 
   if (rtc_enable_protobuf) {
     copy("rtp_analyzer") {
       sources = [
         "py_event_log_analyzer/misc.py",
         "py_event_log_analyzer/pb_parse.py",
         "py_event_log_analyzer/rtp_analyzer.py",
         "py_event_log_analyzer/rtp_analyzer.sh",
       ]
       outputs = [
         "$root_build_dir/{{source_file_part}}",
       ]
       deps = [
         "../logging:rtc_event_log_proto",
       ]
     }
   }
 }