Restrict VR entry pixel checking to newer devices

Temporarily removes the pixel checking portion of
WebXrVrTransitionTest#testRequest*EntersVr on older devices. This check
is flaky due to some low level GL errors, so disable it to prevent CQ
flakes while the root cause is investigated.

TBR=klausw@chromium.org

Bug: 947252
Change-Id: I93db91d851aa8f48c6ce49e73da2e8c9a517baf7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1570566
Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#651459}
1 file changed