mac: Delete the Cocoa autofill code.

Bug: 832676
Change-Id: I25fa2e314592f392a716bcb3b5dd3836bfb878cc
Reviewed-on: https://chromium-review.googlesource.com/1239636
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593586}
25 files changed