Index: wp-includes/js/customize-base.js
===================================================================
--- wp-includes/js/customize-base.js	(revision 22125)
+++ wp-includes/js/customize-base.js	(working copy)
@@ -1,5 +1,4 @@
-if ( typeof wp === 'undefined' )
-	var wp = {};
+window.wp = window.wp || {};
 
 (function( exports, $ ){
 	var api, extend, ctor, inherits,
Index: wp-includes/js/customize-loader.js
===================================================================
--- wp-includes/js/customize-loader.js	(revision 22125)
+++ wp-includes/js/customize-loader.js	(working copy)
@@ -1,5 +1,4 @@
-if ( typeof wp === 'undefined' )
-	var wp = {};
+window.wp = window.wp || {};
 
 (function( exports, $ ){
 	var api = wp.customize,
Index: wp-includes/js/mce-view.js
===================================================================
--- wp-includes/js/mce-view.js	(revision 22125)
+++ wp-includes/js/mce-view.js	(working copy)
@@ -1,6 +1,5 @@
 // Ensure the global `wp` object exists.
-if ( typeof wp === 'undefined' )
-	var wp = {};
+window.wp = window.wp || {};
 
 // HTML utility functions
 // ----------------------
Index: wp-includes/js/media-models.js
===================================================================
--- wp-includes/js/media-models.js	(revision 22125)
+++ wp-includes/js/media-models.js	(working copy)
@@ -1,5 +1,4 @@
-if ( typeof wp === 'undefined' )
-	var wp = {};
+window.wp = window.wp || {};
 
 (function($){
 	var Attachment, Attachments, Query, compare;
Index: wp-includes/js/plupload/wp-plupload.js
===================================================================
--- wp-includes/js/plupload/wp-plupload.js	(revision 22125)
+++ wp-includes/js/plupload/wp-plupload.js	(working copy)
@@ -1,5 +1,4 @@
-if ( typeof wp === 'undefined' )
-	var wp = {};
+window.wp = window.wp || {};
 
 (function( exports, $ ) {
 	var Uploader;
Index: wp-includes/js/shortcode.js
===================================================================
--- wp-includes/js/shortcode.js	(revision 22125)
+++ wp-includes/js/shortcode.js	(working copy)
@@ -1,8 +1,7 @@
 // Utility functions for parsing and handling shortcodes in Javascript.
 
 // Ensure the global `wp` object exists.
-if ( typeof wp === 'undefined' )
-	var wp = {};
+window.wp = window.wp || {};
 
 (function(){
 	wp.shortcode = {