[omnibox chrome:omnibox] Initialize OmniboxOutput displayOptions with defaults.

crrev.com/c/1381145 set the 'show all providers' checkbox checked by default
(on page load). However, this state is not propagated to OmniboxOuptut until at
least 1 display option was changed by the user, leading to unintuitive results:

1) 'show all providers' behaved as if it was unchecked but was displayed checked
2) unchecking 'show all providers' would appear to change nothing
3) checking another display checkbox (e.g. 'show all details'), would also
active 'show all providers'

This CL initializes OmniboxOutput's displayOptions to the default values.

Bug: 891303
Change-Id: I328180d1b79319ff60f23a9c1d860bc1f68d8c76
Reviewed-on: https://chromium-review.googlesource.com/c/1384930
Commit-Queue: manuk hovanesian <manukh@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#618305}
3 files changed