commit 6926632bd1e7eb3a0cd62f34f0e9d546be86d8ed
author sammc <sammc@chromium.org> Wed Mar 29 03:29:55 2017
committer Commit bot <commit-bot@chromium.org> Wed Mar 29 03:29:55 2017
tree 57eb1d610d94aa5e75d1dbf11076546cadc6888b
parent efc29a479db297f2b0077cb15996f461d04cb66b

Pref service: Add initial support for pref registration.

This:
- Adds a mojo structs representing registrations to be passed to
  PrefStoreConnector::Connect calls.

- Uses those registrarions to build a default pref store implemented
  inside the pref service.

- Changes PersistentPrefStoreImpl to use registrations to filter
  observer notifications.

BUG=654988

Review-Url: https://codereview.chromium.org/2777483002
Cr-Commit-Position: refs/heads/master@{#460267}