Guard dbus component and config with assert(use_dbus)

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/features.gni")
 import("//build/config/ui.gni")
 
 assert(enable_extensions)
 
 gypi_values =
@@ skipping 81 matching lines @@
             ".",
             "//chrome")
   }
 
   if (is_chromeos) {
     sources +=
         rebase_path(gypi_values.chrome_browser_extensions_chromeos_sources,
                     ".",
                     "//chrome")
     sources -= [ "api/music_manager_private/device_id_linux.cc" ]
-    configs += [ "//build/config/linux/dbus" ]
+    if (use_dbus) {
+      configs += [ "//build/config/linux/dbus" ]
+    }
     deps += [
       "//components/chrome_apps",
       "//remoting/host/it2me:common",
       "//third_party/protobuf:protobuf_lite",
     ]
   } else {
     sources += [
       "default_apps.cc",
       "default_apps.h'",
     ]
@@ skipping 23 matching lines @@
       "//ui/keyboard:keyboard_with_content",
       "//ui/keyboard:resources",
     ]
   }
 
   if (toolkit_views) {
     deps += [ "//ui/views" ]
   }
 
   if (is_linux) {
-    deps += [
-      "//build/linux:fontconfig",
-      "//dbus",
-    ]
+    deps += [ "//build/linux:fontconfig" ]
+
+    if (use_dbus) {
+      deps += [ "//dbus" ]
+    }
+
     if (use_x11) {
       configs += [ "//build/config/linux:x11" ]
       deps += [
         "//ui/events:events_base",
         "//ui/events/platform",
         "//ui/events/platform/x11",
       ]
     }
     if (!is_chromeos) {
       sources += rebase_path(
@@ skipping 58 matching lines @@
                     "//chrome")
   }
 
   if (is_chromeos && use_ozone) {
     sources -= [ "global_shortcut_listener_chromeos.cc" ]
   }
   if (!use_ozone) {
     sources -= [ "global_shortcut_listener_ozone.cc" ]
   }
 }