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

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

Index: ash/common/system/chromeos/brightness/brightness_controller_chromeos.cc
diff --git a/ash/common/system/chromeos/brightness/brightness_controller_chromeos.cc b/ash/common/system/chromeos/brightness/brightness_controller_chromeos.cc
index 9ee4f779e1973f7c755062be20406472a7fe635a..46268d9a076ff118d805067c502bde66509e4a2a 100644
--- a/ash/common/system/chromeos/brightness/brightness_controller_chromeos.cc
+++ b/ash/common/system/chromeos/brightness/brightness_controller_chromeos.cc
@@ -4,8 +4,9 @@
 
 #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"
 
@@ -17,7 +18,7 @@ void BrightnessControllerChromeos::HandleBrightnessDown(
   if (accelerator.key_code() == ui::VKEY_BRIGHTNESS_DOWN)
     base::RecordAction(base::UserMetricsAction("Accel_BrightnessDown_F6"));
 
-  chromeos::DBusThreadManager::Get()
+  DBusThreadManagerAsh::Get()
       ->GetPowerManagerClient()
       ->DecreaseScreenBrightness(true);
 }
@@ -27,21 +28,21 @@ void BrightnessControllerChromeos::HandleBrightnessUp(
   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);
 }