Remove linked_ptr from content settings.

BUG=556939

Change-Id: Ib4d1da45ba37cf8b1886a61ccd551e2eafc1b351
Reviewed-on: https://chromium-review.googlesource.com/c/1377523
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#618282}
20 files changed