This will be included in isolates for targets which really need it;
initially, angle_end2end_tests.

BUG=angleproject:892

Change-Id: I466455b0cc50a70980ddc09a6db2211f13774abc
Reviewed-on: https://chromium-review.googlesource.com/284361Tested-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>