GitLab

Implement toggleMostVisitedOrCustomLinks for the EmbbededSearchApi.
This will allow users to toggle between Most Visited tiles and custom
links.

Bug: 953822
Change-Id: Ide2d1a62456649a5b6f9ff45d16548ac1212e0b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1572233Reviewed-by: Kyle Milka <kmilka@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Reviewed-by: Greg Kerr <kerrnel@chromium.org>
Commit-Queue: Kristi Park <kristipark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652298}