Remove some rtc hacks in the GN build.

chrome/browser/extensions/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
@@ skipping 62 matching lines @@
     "//ui/strings",
     "//url",
     "//storage/browser",
   ]
 
   forward_dependent_configs_from = [
     "//chrome/common/extensions/api",
     "//content/public/browser",
   ]
 
-  # TODO(GYP) This config should be a direct_dependent_config of 
-  # //third_party/webrtc/modules/desktop_capture so we shouldn't have to
-  # include it here. Remove this line when the direct_dependent_config is set.
-  configs += [ "//third_party/webrtc:common_inherited_config" ]
-
   if (is_chromeos) {
     sources += rebase_path(
         gypi_values.chrome_browser_extensions_chromeos_sources,
         ".", "//chrome")
     configs += [ "//build/config/linux:dbus" ]
     deps += [
       "//third_party/libevent",
       "//third_party/protobuf:protobuf_lite",
       #'../chromeos/ime/input_method.gyp:gencode',  TODO(GYP)
     ]
@@ skipping 109 matching lines @@
         gypi_values.chrome_browser_extensions_app_list_sources,
         ".", "//chrome")
   }
 
   if (!use_ozone) {
     sources -= [
       "global_shortcut_listener_ozone.cc",
     ]
   }
 }