GitLab

That keyed service will, in the future, be responsible for more web app
things than just policy.

Also move c/b/wa/policy to c/b/wa/bookmark_apps/policy, where c/b/wa
means chrome/browser/web_applications. We (nigeltao@, ortuno@, loyso@,
dominickn@) want to organize c/b/wa into a 'root' directory and three
or four sub-directories as we de-tangle web apps from extensions:
- c/b/wa holds only the WebAppProvider and its Factory.
- c/b/wa/extensions is code that is tightly coupled to extensions.
- c/b/wa/bookmark_apps is code that currently depends on
  c/b/wa/extensions but, in the future, should not.
- c/b/wa/components is low level code that is unrelated to extensions.
- c/b/wa/new_bookmark_apps (name pending) is high level code that is
  unrelated to extensions.

Change-Id: Ie42bfc348be7166c710fc6232848b5e9eb91960e
Reviewed-on: https://chromium-review.googlesource.com/1142844
Commit-Queue: Nigel Tao <nigeltao@chromium.org>
Reviewed-by: Bernhard Bauer <bauerb@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576500}