Added prefs for using nsViewManager2 to the debug panel.

suite/common/pref/pref-debug.xul

@@ -49,6 +49,13 @@
 				</html:label>
 			</html:div>
 
+			<html:div>
+				<html:input type="checkbox" id="viewUseViewManager2"
+                    pref="true" preftype="bool" prefstring="nglayout.view.useViewManager2"/>
+				<html:label for="viewUseViewManager2" accesskey="n" tabindex="0">
+			  	&useViewManager2.label;
+				</html:label>
+			</html:div>
 
 			<html:div>
 				<html:input type="checkbox" id="nglayoutDebugWindow"

suite/locales/en-US/chrome/common/pref/pref-debug.dtd

@@ -7,9 +7,10 @@
 <!ENTITY rHeader "Layout and Rendering debugging preferences">
 
 <!-- Debug: Turn on gfx-rendered widgets -->
-<!ENTITY widgetRendering.label "Debug: Widget rendering">
+<!ENTITY widgetRendering.label "Debug: Rendering">
 <!ENTITY gfxScrollbars.label "gfx scrollbars">
 <!ENTITY debugWindow.label "debug window">
+<!ENTITY useViewManager2.label "use ViewManager2">
 
 <!-- Event Debugging -->
 <!ENTITY debugEventDebugging.label "Event Debugging">