[OriginChip] Use the V2 flags to control the new show/hide behavior.

Also, show the security state in the location bar's location icon when the V2 experiment is enabled, since the origin chip and its associated location icon can be hidden.

BUG=338563

Review URL: https://codereview.chromium.org/140483005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249673 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249673