Guard dbus component and config with assert(use_dbus)

extensions/browser/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/features.gni")
 import("//extensions/extensions.gni")
 
 # GYP version: extensions/extensions.gyp:extensions_browser
 source_set("browser") {
   sources = []
@@ skipping 67 matching lines @@
               "//extensions")
       sources += chromeos_sources
     } else {
       nonchromeos_sources = rebase_path(
               extensions_gypi_values.extensions_browser_sources_nonchromeos,
               ".",
               "//extensions")
       sources += nonchromeos_sources
 
       if (is_linux) {
-        configs += [ "//build/config/linux/dbus" ]
-        deps += [ "//dbus" ]
+        if (use_dbus) {
+          deps += [ "//dbus" ]
+        }
         linux_sources = rebase_path(
                 extensions_gypi_values.extensions_browser_sources_linux_nonchromeos,
                 ".",
                 "//extensions")
         sources += linux_sources
       } else {
         if (is_win || is_mac) {
           deps += [ "//components/wifi" ]
 
           win_or_mac_sources = rebase_path(
                   extensions_gypi_values.extensions_browser_sources_win_or_mac,
                   ".",
                   "//extensions")
           sources += win_or_mac_sources
         }
       }
       if (proprietary_codecs && enable_wifi_display) {
         wifi_display_sources = rebase_path(
                 extensions_gypi_values.extensions_browser_sources_wifi_display,
                 ".",
                 "//extensions")
         sources += wifi_display_sources
       }
     }
   }
 }