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

chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc

Index: chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
diff --git a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
index c114ce2f4c6a6c248a5f04a8315d5f746b4613d8..9e72431dc98c32562804b38ed6ffc7609a702d62 100644
--- a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
+++ b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
@@ -5,6 +5,7 @@
 #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"
@@ -27,6 +28,11 @@ void ChromeBrowserMainExtraPartsAsh::PreProfileInit() {
     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() {