Disable TouchpadPinchOverOOPIF tests on Windows

SitePerProcessHitTestBrowserTest.TouchpadPinchOverOOPIF is being
reported as flaky on Windows.

Bug: chromium:868308, chromium:833380
TBR: kenrb@chromium.org
Change-Id: I83142d0d777bbe51773eaba0ab1d191a4af0cbc5
Reviewed-on: https://chromium-review.googlesource.com/1155165
Reviewed-by: Kevin McNee <mcnee@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579096}
2 files changed