Add some shared utility methods to the utils project. BUG=angle:730 Change-Id: I268c7f76ee9a14ab82f646ae8ebf4eed100bf86d Reviewed-on: https://chromium-review.googlesource.com/213509 Reviewed-by: Brandon Jones <bajones@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>