Desktop Zero Suggest - Enable Two "Experimental" Features on Desktop

In particular:
- have the current URL show its title in the dropdown, not only the URL
  (which is displayed twice, once as |contents| and once as |description|)
- display title before URL, as we do with as-you-type experiments these
  days

We've been running with them enabled on desktop for 90+% of traffic;
they were both approved on the linked bug.

Regardless of what happens with desktop zerosuggest, it would be best
if the submitted  code contained the intended defaults / configuration.

Bug: 692471
Change-Id: Icd527c689537e32a9e1dccd73ad30115bd32c402
Reviewed-on: https://chromium-review.googlesource.com/c/1376668
Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Commit-Queue: Mark Pearson <mpearson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616842}
2 files changed