GTK: Improve look of find in page failure label.
GTK: Improve look of find in page failure label.

BUG=http://crbug.com/15874
TEST=looks good

Review URL: http://codereview.chromium.org/155041

git-svn-id: http://src.chromium.org/svn/trunk/src@19965 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: af6faea7305b86ddce1006c7e265d71bdb07219a
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