GitLab

Use enum class instead of enum for MenuPart::Type.
enum class is more type safety.

Bug: 940736
Change-Id: I7b412d7b61584b80a9f9b20c22ecf69533288203
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2543535
Commit-Queue: Hwanseung Lee <hs1217.lee@samsung.com>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828583}