Cookie Store: Test cross-origin frames + service workers.

Ensure cookieStore changes made in cross-origin iframe propagate to
serviceWorkers

Bug: 729800
Change-Id: I447973d2ed886e434a2db0587290dda883f4eb89
Reviewed-on: https://chromium-review.googlesource.com/c/1222913
Commit-Queue: Victor Costan <pwnall@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619347}
3 files changed