Tweaked antialiasing function. Result looks good now in conjunction with multisampling.
Tweaked antialiasing function. Result looks good now in conjunction
with multisampling.

BUG=none
TEST=none
TBR=apatrick

Review URL: http://codereview.chromium.org/3040018

git-svn-id: http://src.chromium.org/svn/trunk/src@53574 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 5e646fd2a4acdb3ef42e6995ea2f07b41addbc56
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser