Fix an unintended test dependency.

If you run either of these tests by themselves, they crash
because scrollbars aren't created.  This is due to the test
text being too small and the page scale minimum being set to 1.

BUG=None
R=aelias@chromium.org

Review URL: https://codereview.chromium.org/23684050

git-svn-id: svn://svn.chromium.org/blink/trunk@157553 bbb929c8-8fbe-4397-9dbb-9b2b20218538