GitLab

This change adds a new_tab_url for the DuckDuckGo search engine.

Change-Id: I37be02e07eb7e4aa90f115455ce7a21832ff4eab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1555048Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Commit-Queue: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#648687}