Eliminate ash::internal namespace

ash/system/chromeos/power/power_event_observer.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/system/chromeos/power/power_event_observer.h"
 
 #include "ash/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray_notifier.h"
 #include "ash/wm/power_button_controller.h"
 #include "base/prefs/pref_service.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "ui/display/chromeos/output_configurator.h"
 #include "ui/wm/core/user_activity_detector.h"
 
 namespace ash {
-namespace internal {
 
 PowerEventObserver::PowerEventObserver()
     : screen_locked_(false) {
   chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
       AddObserver(this);
   chromeos::DBusThreadManager::Get()->GetSessionManagerClient()->
       AddObserver(this);
 }
 
 PowerEventObserver::~PowerEventObserver() {
@@ skipping 45 matching lines @@
     screen_lock_callback_.Reset();
   } else {
     VLOG(1) << "Screen locked without suspend";
   }
 }
 
 void PowerEventObserver::ScreenIsUnlocked() {
   screen_locked_ = false;
 }
 
-}  // namespace internal
 }  // namespace ash