This is so we can run the end2end_tests using Swiftshader. We still
prefer the discrete, then integrated GPUs so that normal testing uses
the real GPU.
Bug: dawn:283
Change-Id: I17a1ffd8aa88ddeaafa019feb67deeb25cdd2da0
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/16220
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Mark Henderson <mehe@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>