Enable FP reporting for unsized-media policy violations.

This queues a report through the Reporting API whenever an image is
encountered which violates the 'unsized-media' policy, in a document in
which that feature is not allowed according to feature policy.

Bug: 867471
Change-Id: I8d39639d21d9a993685f97efc078a9a1ab6f303c
Reviewed-on: https://chromium-review.googlesource.com/1195675
Reviewed-by: Steve Kobes <skobes@chromium.org>
Commit-Queue: Ian Clelland <iclelland@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587236}
4 files changed