suppress some skia mac failures to green up the bots
suppress some skia mac failures to green up the bots

TBR=sail

Review URL: http://codereview.chromium.org/6880061

git-svn-id: http://src.chromium.org/svn/trunk/src@82233 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 92bcb1f2ced2300ad03d3704ec97646473c19cbf
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