mash: Allow a subset of D-Bus clients to be created in DBusThreadManager

ash/common/system/chromeos/brightness/brightness_controller_chromeos.cc

 // Copyright 2013 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.
 
 #include "ash/common/system/chromeos/brightness/brightness_controller_chromeos.h"
 
+#include "ash/common/dbus_thread_manager_ash.h"
 #include "base/metrics/user_metrics.h"
-#include "chromeos/dbus/dbus_thread_manager.h"
+// #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/power_manager_client.h"
 #include "ui/base/accelerators/accelerator.h"
 
 namespace ash {
 namespace system {
 
 void BrightnessControllerChromeos::HandleBrightnessDown(
     const ui::Accelerator& accelerator) {
   if (accelerator.key_code() == ui::VKEY_BRIGHTNESS_DOWN)
     base::RecordAction(base::UserMetricsAction("Accel_BrightnessDown_F6"));
 
-  chromeos::DBusThreadManager::Get()
+  DBusThreadManagerAsh::Get()
       ->GetPowerManagerClient()
       ->DecreaseScreenBrightness(true);
 }
 
 void BrightnessControllerChromeos::HandleBrightnessUp(
     const ui::Accelerator& accelerator) {
   if (accelerator.key_code() == ui::VKEY_BRIGHTNESS_UP)
     base::RecordAction(base::UserMetricsAction("Accel_BrightnessUp_F7"));
 
-  chromeos::DBusThreadManager::Get()
+  DBusThreadManagerAsh::Get()
       ->GetPowerManagerClient()
       ->IncreaseScreenBrightness();
 }
 
 void BrightnessControllerChromeos::SetBrightnessPercent(double percent,
                                                         bool gradual) {
-  chromeos::DBusThreadManager::Get()
+  DBusThreadManagerAsh::Get()
       ->GetPowerManagerClient()
       ->SetScreenBrightnessPercent(percent, gradual);
 }
 
 void BrightnessControllerChromeos::GetBrightnessPercent(
     const base::Callback<void(double)>& callback) {
-  chromeos::DBusThreadManager::Get()
+  DBusThreadManagerAsh::Get()
       ->GetPowerManagerClient()
       ->GetScreenBrightnessPercent(callback);
 }
 
 }  // namespace system
 }  // namespace ash