Sandbox windows not provided to chrome.app.window.create.

extensions/renderer/resources/app_window_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 binding for the app_window API.
 
 var appWindowNatives = requireNative('app_window_natives');
 var runtimeNatives = requireNative('runtime');
 var Binding = require('binding').Binding;
 var Event = require('event_bindings').Event;
@@ skipping 122 matching lines @@
 
     if (windowParams.existingWindow) {
       // Not creating a new window, but activating an existing one, so trigger
       // callback with existing window and don't do anything else.
       if (callback)
         callback(view.chrome.app.window.current());
       return;
     }
 
     // Initialize appWindowData in the newly created JS context
-    view.chrome.app.window.initializeAppWindow(windowParams);
+    if (view.chrome.app) {
+      view.chrome.app.window.initializeAppWindow(windowParams);
+    } else {
+      var sandbox_window_message = 'Creating sandboxed window, it doesn\'t ' +
+          'have access to the chrome.app API.';
+      if (callback) {
+        sandbox_window_message = sandbox_window_message +
+            ' The chrome.app.window.create callback will be called, but ' +
+            'there will be no object provided for the sandboxed window.';
+      }
+      console.warn(sandbox_window_message);
+    }
 
     if (callback) {
-      if (!view) {
+      if (!view || !view.chrome.app /* sandboxed window */) {
         callback(undefined);
         return;
       }
 
       var willCallback =
           renderViewObserverNatives.OnDocumentElementCreated(
               windowParams.viewId,
               function(success) {
                 if (success) {
                   callback(view.chrome.app.window.current());
@@ skipping 233 matching lines @@
       constraints[key] = 0;
   });
 
   currentWindowInternal.setSizeConstraints(boundsType, constraints);
 }
 
 exports.binding = appWindow.generate();
 exports.onAppWindowClosed = onAppWindowClosed;
 exports.updateAppWindowProperties = updateAppWindowProperties;
 exports.appWindowShownForTests = onAppWindowShownForTests;