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In this CL, when the mouse click on the main button or the delete button
is canceled, the menu selection is refreshed by:
(1) Select the menu item hovered by mouse if any; otherwise,
(2) Select the root menu item to cancel the selection on a child item.

Bug: 1165999
Change-Id: I86bebc2b1dc08665a98da366a6a6bdb9fab532d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2625798Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: David Black <dmblack@google.com>
Commit-Queue: Andrew Xu <andrewxu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843103}