https://bugs.webkit.org/show_bug.cgi?id=82556

Reviewed by Adam Barth.

As Bug 73528 comment #71, NavigatorBattery.idl doesn't need to have ScriptExecutionContext.
Document can be used instead of ScriptExecutionContext.

Tests: batterystatus/add-listener-from-callback.html
       batterystatus/basic-all-types-of-events.html
       batterystatus/basic-operation.html
       batterystatus/event-after-navigation.html
       batterystatus/multiple-frames.html
       batterystatus/updates.html
       batterystatus/window-property.html

* Modules/battery/BatteryManager.cpp:
(WebCore::BatteryManager::create):
(WebCore::BatteryManager::BatteryManager):
* Modules/battery/BatteryManager.h:
(BatteryManager):
* Modules/battery/NavigatorBattery.cpp:
(WebCore::NavigatorBattery::webkitBattery):
* Modules/battery/NavigatorBattery.h:
(NavigatorBattery):
* Modules/battery/NavigatorBattery.idl:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@112495 268f45cc-cd09-0410-ab3c-d52691b4dbfc