rtc_task_queue should not expose rtc_base_approved API

webrtc/modules/utility/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("../../webrtc.gni")
 
@@ skipping 16 matching lines @@
 
   if (is_ios) {
     libs = [ "AVFoundation.framework" ]
   }
 
   deps = [
     "..:module_api",
     "../..:webrtc_common",
     "../../audio/utility:audio_frame_operations",
     "../../common_audio",
+    "../../rtc_base:rtc_base_approved",
     "../../rtc_base:rtc_task_queue",
     "../../system_wrappers",
     "../media_file",
   ]
 }
 
 rtc_source_set("mock_process_thread") {
   testonly = true
   sources = [
     "include/mock/mock_process_thread.h",
@@ skipping 14 matching lines @@
     # cover (which would be confusing to read and hard to maintain).
     if (!is_android && !is_ios) {
       visibility = [ "..:modules_unittests" ]
     }
     sources = [
       "source/process_thread_impl_unittest.cc",
     ]
     deps = [
       ":utility",
       "..:module_api",
+      "../../rtc_base:rtc_base_approved",
       "../../rtc_base:rtc_task_queue",
       "../../test:test_support",
       "//testing/gmock",
     ]
   }
 }