GitLab

Replace DCHECK with conditions and set the connection status as
unencrypted, if the security_style is unknown / HTTPS without a
certificate / not HTTPS.

BUG=344891

Review URL: https://codereview.chromium.org/172173004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269560 0039d316-1c4b-4281-b951-d872f2087c98