Unregister AutocompleteCoordinator as listener when destroyed

Bug: 966987
Change-Id: I445cd14c9140a650231061200c59d28cd34bc7c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1627757
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Brandon Wylie <wylieb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#663332}
1 file changed