It was mostly being included for querying the current state and EGL includes.

BUG=angle:733

Change-Id: Ia985dbc9de5739f6ea7fa5bb6eb2e187cc1d60f3
Reviewed-on: https://chromium-review.googlesource.com/230780Reviewed-by: Brandon Jones <bajones@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>