GitLab

These gesture enums were missing.  Prevented two finger tap
from silencing the screen reader.

Bug: 888695
Test: Manual
Change-Id: I6e71cf65de19651ea3560fbf825cfe59ca6cdcbb
Reviewed-on: https://chromium-review.googlesource.com/1241274Reviewed-by: Alex Sakhartchouk <alexst@chromium.org>
Commit-Queue: Randy Rossi <rmrossi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595111}