Fix a skia valgrind error.
Fix a skia valgrind error.

Review URL: http://codereview.chromium.org/134001

git-svn-id: http://src.chromium.org/svn/trunk/src@18710 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: a08616855f1bd1c7c2cbf98e8c022642810f1de0
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