GitLab

Use enum class instead of enum for InitialFocusStateOnMousePress.
enum class is more type safety.

Bug: 940736
Change-Id: I81dcb02659fe0c6295fa9b8a77684f31e6e8425e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2345824
Commit-Queue: Hwanseung Lee <hs1217.lee@samsung.com>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796690}