GitLab

This is done so that the UI can be programmatically instantiated
from within a test, with
document.createElement('usb-internals-app');

in preparation of migrating to JS modules, where during tests,
test_loader.html is loaded instead of the original landing HTML
page.

Bug: 1139849
Change-Id: I919179150385e906665746afbfc6ce0aa2480498
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2486963
Commit-Queue: dpapad <dpapad@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819490}