This page includes the following <script> tag:
<script src="http://plovr.com:9810/compile?id=demo&mode=WHITESPACE"></script>
If you view the content of the <script> tag included in this page, you will see that it contains a sizable amount of JavaScript because it contains all of the code from the 22 <script> tags loaded from the RAW demo page. This includes many Closure Library functions that are never used by this page.