Add back a line in file_util.h that was accidentally deleted long ago.
Add back a line in file_util.h that was accidentally deleted long ago.

Review URL: http://codereview.chromium.org/652111

git-svn-id: http://src.chromium.org/svn/trunk/src@39712 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 5b76433537481941f79f672c8176142cddd5d80d
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