It turns out there are bugs in our tests, so kbr fixed them a while ago.  Now we had another look at the tests, and it turned out some functions we don't have emulate, and some functions we need to also emulate in fragment shaders.

BUG=
TEST=
R=kbr
Review URL: https://codereview.appspot.com/6011056

git-svn-id: https://angleproject.googlecode.com/svn/trunk@1034 736b8ea6-26fd-11df-bfd4-992fa37f6226