Fix test style issues following the commit of
https://bugs.webkit.org/show_bug.cgi?id=114412

Unreviewed gardening.

* css3/compositing/effect-background-blend-mode-color.html:
* css3/compositing/effect-background-blend-mode-color2.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149023 268f45cc-cd09-0410-ab3c-d52691b4dbfc