Disable browser test TabCaptureApiPixelTest.OffscreenTabEvilTests on Mac

The test is consistently timing out on all Mac testers

Bug: 864250
Change-Id: I493aa756176c5df2b7333bd36beb84895e6e2711
NoTry: True
Tbr: miu@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1139002
Reviewed-by: Xiaocheng Hu <xiaochengh@chromium.org>
Commit-Queue: Xiaocheng Hu <xiaochengh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575481}
1 file changed