Valgrind: Suppress a new Mac memory error.
Valgrind: Suppress a new Mac memory error.

BUG=48269
TEST=Chromium Mac UI (valgrind)(2) gets a bit greener.
Review URL: http://codereview.chromium.org/2824051

git-svn-id: http://src.chromium.org/svn/trunk/src@51609 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: d2a8956531b743a9c18390ccd24c7faab9a05c98
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