GitLab

This creates the permissions component, and moves in PermissionRequest,
PermissionRequestID, and PermissionResult.

Most of the changes in //chrome were performed with sed:
- change includes of moved classes from chrome/browser/permissions to
  components/permissions
- add permissions:: namespace on moved classes

Bug: 1025609
Change-Id: Id13b874e84b9fadf96b228154091c5cc0b8f0121
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2015763Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Balazs Engedy <engedy@chromium.org>
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#734602}