Valgrind: Widen a mac suppression.
Valgrind: Widen a mac suppression.

BUG=61816
TEST=Valgrind Mac unit goes green.
Review URL: http://codereview.chromium.org/6092010

git-svn-id: http://src.chromium.org/svn/trunk/src@70545 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 91a8d89d52948f4b4fd184973321394e658199d2
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