Origin Policy: Apply CSP of an active origin policy.

Gated on --enable-features=OriginPolicy (via the test in OriginPolicyThrottle).

Bug: 751996
Change-Id: I433e406fe400f86f0b677752908839da7d3d9345
Reviewed-on: https://chromium-review.googlesource.com/1111960
Reviewed-by: Mike West <mkwst@chromium.org>
Reviewed-by: Andy Paicu <andypaicu@chromium.org>
Commit-Queue: Daniel Vogelheim <vogelheim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576875}
7 files changed