The texture v coordinate was still being flipped.

Fixes http://code.google.com/p/chromium/issues/detail?id=136650.
Review URL: https://codereview.appspot.com/6345095

git-svn-id: https://angleproject.googlecode.com/svn/trunk@1214 736b8ea6-26fd-11df-bfd4-992fa37f6226