GitLab

This CL is a minor renaming CL with no functional changes.

This prepares for the introduction of a new use for the app layout:
app install banners for web and native apps.

BUG=811578

Change-Id: Iff4201d160cb93bb2881d24a2f24cadf7fcd94bc
Reviewed-on: https://chromium-review.googlesource.com/920125Reviewed-by: Peter Kotwicz <pkotwicz@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537913}