Fix a minor doc issue in fps.js
Fix a minor doc issue in fps.js

Review URL: http://codereview.chromium.org/151062

git-svn-id: http://src.chromium.org/svn/trunk/src@19571 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: d01a9ea97096357a3ef1178d24b53276c15e2345
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