Separate quad UV calculation from bloat_quad

For GPU hairlines move UV calculation on vertices for quads to its
own function outside of bloat_quad. This is done since conics share
the bloat quad function and don't need to do this calcuation.

BUG=
R=bsalomon@google.com

Review URL: https://codereview.chromium.org/22043006

git-svn-id: http://skia.googlecode.com/svn/trunk@10547 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed