GitLab

Add a FlexLayoutView with the various setters and getters for the
FlexLayout exposed as View properties.

Bug: None
Change-Id: Id4380e9353c7f47774ac35a074559dc31492ab77
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2419135Reviewed-by: Allen Bauer <kylixrd@chromium.org>
Commit-Queue: Thomas Lukaszewicz <tluk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809870}