[battery-status-tests] Update tests for Battery Status API (#1488)

- According to Battery Status API CR on 09December 2014,we must get BatteryManager object by navigator.getBattery() instead of navigator.battery.

View on GitHub: https://github.com/w3c/web-platform-tests/pull/1488

Received on Friday, 26 December 2014 06:53:25 UTC