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1. Use new sync and autofill APIs.
2. Introduce a sync menu.
3. Autofill data menu.
4. Consent/Unlock menu.

Change-Id: I283b6087c09a2688ed7ea3fdf53d44fe72b63e83
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1823724
Commit-Queue: John Wu <jzw@chromium.org>
Reviewed-by: Hiroshi Ichikawa <ichikawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700078}