Convert TimeFormat (chrome/common/time_format.*) to string16 (from wstring).

chrome/browser/chromeos/low_battery_observer.cc

Index: chrome/browser/chromeos/low_battery_observer.cc
diff --git a/chrome/browser/chromeos/low_battery_observer.cc b/chrome/browser/chromeos/low_battery_observer.cc
index b923f080a998d97dd7c0031e0059c28c873afa5c..41f25526d146e6c7ee11e61cd03dd65623793c02 100644
--- a/chrome/browser/chromeos/low_battery_observer.cc
+++ b/chrome/browser/chromeos/low_battery_observer.cc
@@ -72,7 +72,7 @@ void LowBatteryObserver::PowerChanged(PowerLibrary* object) {
 
 void LowBatteryObserver::Show(base::TimeDelta remaining, bool urgent) {
   notification_.Show(l10n_util::GetStringFUTF16(IDS_LOW_BATTERY_MESSAGE,
-      WideToUTF16(TimeFormat::TimeRemaining(remaining))), urgent);
+      TimeFormat::TimeRemaining(remaining)), urgent);
   remaining_ = remaining.InMinutes();
 }