GitLab

Delete any links initialized from Most Visited when their history entry
is cleared. If the link is modified by the user (i.e. edit/add), the
link will not be deleted when history is cleared.

Bug: 874185
Change-Id: I762fe713c097bfa75e86b25368cff25e116d674d
Reviewed-on: https://chromium-review.googlesource.com/1179246
Commit-Queue: Kristi Park <kristipark@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587227}