[OriginChip] Make trailing location bar the first "enabled" option.

This preserves the original behavior for users who had previously enabled the origin chip at chrome://flags.

BUG=333294

Review URL: https://codereview.chromium.org/131673003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244645 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244645