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

chrome/browser/chrome_browser_main_extra_parts_ash.cc

Index: chrome/browser/chrome_browser_main_extra_parts_ash.cc
diff --git a/chrome/browser/chrome_browser_main_extra_parts_ash.cc b/chrome/browser/chrome_browser_main_extra_parts_ash.cc
index c8870da00a6b85f164445ae2eb0d6f0e480f1432..4c0887d38075c79d448988256eec477f5e6cb2f7 100644
--- a/chrome/browser/chrome_browser_main_extra_parts_ash.cc
+++ b/chrome/browser/chrome_browser_main_extra_parts_ash.cc
@@ -24,6 +24,7 @@
 
 #if defined(OS_CHROMEOS)
 #include "base/chromeos/chromeos_version.h"
+#include "chrome/browser/chromeos/battery_status_provider_chromeos.h"
 #include "chrome/browser/ui/views/ash/brightness_controller_chromeos.h"
 #include "chrome/browser/ui/views/ash/ime_controller_chromeos.h"
 #include "chrome/browser/ui/views/ash/volume_controller_chromeos.h"
@@ -74,6 +75,11 @@ void ChromeBrowserMainExtraPartsAsh::PreProfileInit() {
 
   // Make sure the singleton ScreenOrientationListener object is created.
   ScreenOrientationListener::GetInstance();
+
+#if defined(OS_CHROMEOS)
+  // Make sure the singleton BatteryStatusProviderChromeos object is created.
+  BatteryStatusProviderChromeos::GetInstance();
+#endif
 }
 
 void ChromeBrowserMainExtraPartsAsh::PostProfileInit() {