GitLab

OnEventFromSource for the |held_move_event_| may not return if
one of the event handler creates a run loop -- this happens
on tab-dragging. As long as |held_move_event_| is valid, any
further touch moves are also held and not processed anymore.

Bug: b/119260190
Test: manually
Change-Id: Ibeacc167bbcf71d6d89a40ad2916ecf1f880998c
Reviewed-on: https://chromium-review.googlesource.com/c/1330061Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Jun Mukai <mukai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607023}