chromeos: Add support for the battery status API on chromeos.

chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.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/ui/views/ash/chrome_browser_main_extra_parts_ash.h"
 
 #include "chrome/browser/chrome_browser_main.h"
+#include "chrome/browser/chromeos/battery_status_provider_chromeos.h"
 #include "chrome/browser/toolkit_extra_parts.h"
 #include "chrome/browser/ui/ash/ash_init.h"
 #include "ui/aura/desktop/desktop_screen.h"
 #include "ui/aura/desktop/desktop_stacking_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/single_display_manager.h"
 #include "ui/gfx/screen.h"
 
 ChromeBrowserMainExtraPartsAsh::ChromeBrowserMainExtraPartsAsh() {
 }
 
 ChromeBrowserMainExtraPartsAsh::~ChromeBrowserMainExtraPartsAsh() {
 }
 
 void ChromeBrowserMainExtraPartsAsh::PreProfileInit() {
   if (chrome::ShouldOpenAshOnStartup()) {
     chrome::OpenAsh();
   } else {
     aura::Env::GetInstance()->SetDisplayManager(new aura::SingleDisplayManager);
     stacking_client_.reset(new aura::DesktopStackingClient);
     gfx::Screen::SetInstance(aura::CreateDesktopScreen());
   }
+
+#if defined(OS_CHROMEOS)
+  // Make sure the singleton BatteryStatusProviderChromeos object is created.
+  BatteryStatusProviderChromeos::GetInstance();
+#endif
 }
 
 void ChromeBrowserMainExtraPartsAsh::PostProfileInit() {
 }
 
 void ChromeBrowserMainExtraPartsAsh::PostMainMessageLoopRun() {
   chrome::CloseAsh();
 }
 
 namespace chrome {
 
 void AddAshToolkitExtraParts(ChromeBrowserMainParts* main_parts) {
   main_parts->AddParts(new ChromeBrowserMainExtraPartsAsh());
 }
 
 }  // namespace chrome