Remove toolbar for DevTools and legacy packaged apps for streamlined hosted apps.

This CL removes the toolbar from the dev tools app and legacy packaged app for
streamlined hosted by turning off FEATURE_LOCATIONBAR for these cases.

BUG=318607

Review URL: https://codereview.chromium.org/159613002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250612 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250612