GitLab

Split KeyPermissionsManager,
KeyPermissionsManager::PermissionsForExtension and
KeyPermissionsManagerUserService into a public virtual API and
implementation in *Impl classes.
This will be used in a follow-up CL to test interactions with
KeyPermissionsManager in unit tests.

Note: This CL does not change any behavior.

Bug: 1127506
Change-Id: Iacbbd6e533db0b476b2fb5d6e04e241966c7bafa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2413248Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Reviewed-by: Edman Anjos <edman@chromium.org>
Reviewed-by: Omar Morsi <omorsi@google.com>
Commit-Queue: Edman Anjos <edman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808017}