GitLab

Delete the pwa.html and os-settings-manifest.json files, and install via
a WebApplicationInfo.

Bug: 1085274
Bug: 1126752
Change-Id: Ie269b46771daa7f302821491735e42b53e7bfc2d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2475310
Commit-Queue: Dominic Schulz <dominicschulz@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Auto-Submit: Dominic Schulz <dominicschulz@google.com>
Cr-Commit-Position: refs/heads/master@{#819034}