Use high performance GPU by default in GPU tests.

Upcoming CLs will change the heuristics for selecting the low-power
vs. high-performance GPUs on dual-GPU systems, macOS in particular.
The GPU tests in Chromium's hardware fleet expect to run on the
high-power GPU, so maintain this behavior by default.

Bug: 965842
Change-Id: I17707475a4505905ea95a8a57d06a1754fc101fc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1665910
Reviewed-by: ccameron <ccameron@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#670302}
1 file changed