Cache the object given to the chrome.app.window.create callback

chrome/browser/extensions/api/app_window/app_window_api.cc

 // 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.
 
 #include "chrome/browser/extensions/api/app_window/app_window_api.h"
 
 #include "base/time.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/window_controller.h"
 #include "chrome/browser/ui/extensions/shell_window.h"
@@ skipping 94 matching lines @@
     if (create_params.bounds.height() < minimum_size.height())
       create_params.bounds.set_height(minimum_size.height());
   }
   ShellWindow* shell_window =
       ShellWindow::Create(profile(), GetExtension(), url, create_params);
   shell_window->GetBaseWindow()->Show();
 
   content::WebContents* created_contents = shell_window->web_contents();
   int view_id = created_contents->GetRenderViewHost()->GetRoutingID();
 
-  SetResult(base::Value::CreateIntegerValue(view_id));
+  scoped_ptr<base::DictionaryValue> result(new base::DictionaryValue);
+  result->SetInteger("viewId", view_id);
+  result->SetString("id", shell_window->window_key());
+
+  SetResult(result.release());
   return true;
 }
 
 }  // namespace extensions