Reverting until chromium sandbox issues are resolved.

This reverts commit b7f1a8b0.

BUG=484963
BUG=angleproject:961

Change-Id: I4b030329a322d0a96a18e6ae875d500c5f755ddd
Reviewed-on: https://chromium-review.googlesource.com/270490Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>