GitLab

WaylandPointer was supplying the complete set of flags to MouseEvent
rather than the button that actually changed.

BUG=none
TEST=covered by test

Change-Id: Ib44585549d67001fdab847205819cea4cd646544
Reviewed-on: https://chromium-review.googlesource.com/996924Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Commit-Queue: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548468}