Increase mac morejs variance.
Increase mac morejs variance.

Recent false positives on mac morejs page cycler have
shown up.  Increase the variance to squelch them.

BUG=none
TEST=mac morejs perf alerts are quelled

Review URL: http://codereview.chromium.org/385122

git-svn-id: http://src.chromium.org/svn/trunk/src@32141 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 032b6c97caf18c1406548106c20be92fc5b3d405
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