GitLab

Use enum class instead of enum for views::LayoutFadeType.
enum class is more type safety.

Bug: 940736
Change-Id: I9c026d131835d77d212e4084bc84cb703a0638a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2120837
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#753529}