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Implementation of the Battery Status API for the Windows platform.
Implementation uses a message window to receive battery notifications.
On versions prior to Vista there is limited support as the
RegisterPowerSettingNotification function is not available.

BUG=122593
TEST=http://jsbin.com/battery-status-test (manual)

Review URL: https://codereview.chromium.org/447853002

Cr-Commit-Position: refs/heads/master@{#289634}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289634 0039d316-1c4b-4281-b951-d872f2087c98