Suppressing memory leak in Mac unit test.
Suppressing memory leak in Mac unit test.

TBR=thakis@chromium.org
BUG=64797
TEST=mac valgrind unit test should cycle green

Review URL: http://codereview.chromium.org/5390003

git-svn-id: http://src.chromium.org/svn/trunk/src@67747 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: f42bb7f9fa25371f42b6cb48c8381769d4d57f31
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