GitLab

Previous cleanup CL:
https://chromium-review.googlesource.com/c/chromium/src/+/2520476

- app_type() and app_type_ is always kExtension.
- Exclude from_bookmark() extensions.

Bug: 1065748
Change-Id: I39301a2537c2e77633ef85067f6bd81f9adacecc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2522831
Commit-Queue: Alexey Baskakov <loyso@chromium.org>
Reviewed-by: Nancy Wang <nancylingwang@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827499}