Replace raw pointer to content settings with rvalue ref to unique_ptr

Bug: 914453
Change-Id: I3cc2e47c21979d44648d17004d27519dc2a408f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1577420
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Balazs Engedy <engedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653129}
30 files changed