Reorder Initialize call in WebGPUTest::FlushNoCommands

WebGPUTest::FlushNoCommands never runs because the check
for WebGPUSupported happens before the test initializes

Moving the Initialize call to happen first should make the
test run on supported platforms.

Bug: 990536
Change-Id: Ie3966c053de0ec18df87429d997b134acad20f87
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1733892
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Rafael Cintron <rafael.cintron@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#684490}
2 files changed