chromeos: Destroy PowerStateOverride before D-Bus.

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/chrome_browser_main_chromeos.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/shell.h"
@@ skipping 529 matching lines @@
   // Tell DeviceSettingsService to stop talking to session_manager.
   chromeos::DeviceSettingsService::Get()->Shutdown();
 
   // We should remove observers attached to D-Bus clients before
   // DBusThreadManager is shut down.
   screen_lock_observer_.reset();
   resume_observer_.reset();
   brightness_observer_.reset();
   media_transfer_protocol_device_observer_.reset();
   output_observer_.reset();
+  power_state_override_.reset();
 
   // The XInput2 event listener needs to be shut down earlier than when
   // Singletons are finally destroyed in AtExitManager.
   chromeos::XInputHierarchyChangedEventListener::GetInstance()->Stop();
 
   // chromeos::SystemKeyEventListener::Shutdown() is always safe to call,
   // even if Initialize() wasn't called.
   chromeos::SystemKeyEventListener::Shutdown();
   chromeos::imageburner::BurnManager::Shutdown();
   chromeos::AudioHandler::Shutdown();
@@ skipping 57 matching lines @@
       LOG(WARNING) << "low_mem: Part of '100MB' experiment";
       chromeos::LowMemoryObserver::SetLowMemoryMargin(100);
     } else if (trial->group() == margin_200mb) {
       LOG(WARNING) << "low_mem: Part of '200MB' experiment";
       chromeos::LowMemoryObserver::SetLowMemoryMargin(200);
     } else {
       LOG(WARNING) << "low_mem: Part of 'default' experiment";
     }
   }
 }