Add class consistency_checker for domview_ui. - consistency_checker is to check consistency of the DOM-tree associated with a domview_ui. - It is so closed to domview_ui, so it may access private variables. - But, it uses public interface of domview_ui if possible. - consistency_checker is not integrated to domview_ui for separating functions of consistency checking from the domview_ui. It collects relative logic into a place and setups a boundary from others.

<?xml version="1.0"?>
<!DOCTYPE overlay SYSTEM "chrome://chromelist/locale/ChromeListOverlay.dtd" >
<overlay id="MadBuilderOverlay"
	 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

<script type="application/x-javascript"
	src="chrome://MadBuilder/content/MadBuilderOverlay.js" />

<menupopup id="menu_ToolsPopup">
	<menuitem insertafter="devToolsSeparator" label="MadBuilder"
	oncommand="start_madbuilder();" />
</menupopup>

</overlay>