HSTS preload list: do not include subdomains for flipagram.com .

Reason given:

> Some time ago, I launched HSTS on flipagram.com and submitted it to the
> preload app with the includeSubdomains property set in the header.
> Unfortunately, I did not realize the full implications of including this
> flag until recently. Our engineering team cannot reach many of our
> internal subdomains because they are only reachable with http.

BUG=527947
TBR=agl@chromium.org

Review URL: https://codereview.chromium.org/1513793003

Cr-Commit-Position: refs/heads/master@{#364277}
2 files changed