Tweak CSSJanus to support noflip for selectors with parentheses

Also suggested for CSSJanus itself at http://code.google.com/p/cssjanus/issues/detail?id=22

Change-Id: I4e3b21522e9c5a72cd456ed3d6a0be9225e4b70d
Merge "Tweak CSSJanus to support noflip for selectors with parentheses"