Fix crash in extension_custom_bindings.js by defining WINDOW_ID_NONE locally

chrome/renderer/resources/extensions/extension_custom_bindings.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Custom bindings for the extension API.
 
 (function() {
 
 native function GetChromeHidden();
 native function GetExtensionViews();
 
+// This should match chrome.windows.WINDOW_ID_NONE.
+//
+// We can't use chrome.windows.WINDOW_ID_NONE directly because the
+// chrome.windows API won't exist unless this extension has permission for it;
+// which may not be the case.
+var WINDOW_ID_NONE = -1;
+
 GetChromeHidden().registerCustomHook('extension', function(bindingsAPI) {
   // getTabContentses is retained for backwards compatibility.
   // See http://crbug.com/21433
   chrome.extension.getTabContentses = chrome.extension.getExtensionTabs;
 
   var apiFunctions = bindingsAPI.apiFunctions;
 
   apiFunctions.setHandleRequest("extension.getViews", function(properties) {
-    var windowId = chrome.windows.WINDOW_ID_NONE;
+    var windowId = WINDOW_ID_NONE;
     var type = "ALL";
     if (typeof(properties) != "undefined") {
       if (typeof(properties.type) != "undefined") {
         type = properties.type;
       }
       if (typeof(properties.windowId) != "undefined") {
         windowId = properties.windowId;
       }
     }
     return GetExtensionViews(windowId, type) || null;
   });
 
   apiFunctions.setHandleRequest("extension.getBackgroundPage", function() {
     return GetExtensionViews(-1, "BACKGROUND")[0] || null;
   });
 
   apiFunctions.setHandleRequest("extension.getExtensionTabs",
       function(windowId) {
     if (typeof(windowId) == "undefined")
-      windowId = chrome.windows.WINDOW_ID_NONE;
+      windowId = WINDOW_ID_NONE;
     return GetExtensionViews(windowId, "TAB");
   });
 });
 
 })();