HTML titlebars for v2 apps.

chrome/renderer/resources/extensions/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 bindings for the app_window API.
 
 var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 var sendRequest = require('sendRequest').sendRequest;
 var appWindowNatives = requireNative('app_window');
 var GetView = appWindowNatives.GetView;
 
 chromeHidden.registerCustomHook('app.window', function(bindingsAPI) {
   var apiFunctions = bindingsAPI.apiFunctions;
   apiFunctions.setCustomCallback('create', function(name, request, viewId) {
     var view = null;
-    if (viewId)
-      view = GetView(viewId);
+    if (viewId) {
+      var shouldShowFrame = !request.args[1] || request.args[1].frame != 'none';
+      view = GetView(viewId, !!shouldShowFrame);
+    }
     if (request.callback) {
       request.callback(view);
       delete request.callback;
     }
   })
   apiFunctions.setHandleRequest('moveTo', function(x, y) {
     window.moveTo(x, y);
   })
   apiFunctions.setHandleRequest('resizeTo', function(width, height) {
     window.resizeTo(width, height);
   })
 });