[Code health] Disable TouchActionBrowserTests on Debug and *San bots

These tests are flaky on Debug builds and *San bots. These tests sends
synthetic gesture event and measure scroll offset. It should be fine
without coverages on Debug and *San builds.

TBR=sahel@chromium.org, tdresser@chromium.org

Bug: 855979, 833015
Change-Id: I009d3557454e0aab960d35fc5256ed487c2e47fe
Reviewed-on: https://chromium-review.googlesource.com/1135195
Reviewed-by: Xida Chen <xidachen@chromium.org>
Commit-Queue: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574579}
1 file changed