Bug 372182 - Performance of CommandService.renderCommands needs to be addressed. Add missing dijit drop down button dependency.
diff --git a/bundles/org.eclipse.orion.client.core/web/orion/explorer-table.js b/bundles/org.eclipse.orion.client.core/web/orion/explorer-table.js
index c727bf0..3c35693 100644
--- a/bundles/org.eclipse.orion.client.core/web/orion/explorer-table.js
+++ b/bundles/org.eclipse.orion.client.core/web/orion/explorer-table.js
@@ -12,8 +12,8 @@
 /*global define window */
 /*jslint regexp:false browser:true forin:true*/
 
-define(['require', 'dojo', 'orion/util', 'orion/explorer', 'orion/explorerNavHandler', 'orion/breadcrumbs', 'orion/fileCommands', 'orion/extensionCommands', 'orion/contentTypes', 'dojo/number'],
-		function(require, dojo, mUtil, mExplorer, mNavHandler, mBreadcrumbs, mFileCommands, mExtensionCommands){
+define(['require', 'dojo', 'dijit', 'orion/util', 'orion/explorer', 'orion/explorerNavHandler', 'orion/breadcrumbs', 'orion/fileCommands', 'orion/extensionCommands', 'orion/contentTypes', 'dojo/number', 'dijit/form/DropDownButton'],
+		function(require, dojo, dijit, mUtil, mExplorer, mNavHandler, mBreadcrumbs, mFileCommands, mExtensionCommands){
 
 	/**
 	 * Tree model used by the FileExplorer