Make more of content pass "gn check"

Adds dependencies and makes some deps public so more of content passes include checking. This adds 25 targets.

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1817903002

Cr-Commit-Position: refs/heads/master@{#382430}
16 files changed