Fixed Apps v2 scrolling.

The bug was introduced by https://chromiumcodereview.appspot.com/22006002, which
replaced no-scroll with separate no-horizontal-scroll and no-vertical-scroll
classes, but failed to update this spot.

BUG=272348

Review URL: https://codereview.chromium.org/26955003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228633 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228633