Fix truncated location bar on maximized streamlined hosted apps.

Streamlined Hosted App windows were having their location bar truncated
when maximized. This was due to using the popup-style location bar to
get the omnibox to be read-only.

This CL changes streamlined hosted apps to use the normal location bar
and sets the omnibox to be read only at a deeper level.

BUG=318607

Review URL: https://codereview.chromium.org/110413007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243705 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243705