Introduce chrome.shell.createWindow stub API for app_shell

chrome/test/base/chrome_render_view_test.h

 // 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.
 
 #ifndef CHROME_TEST_BASE_CHROME_RENDER_VIEW_TEST_H_
 #define CHROME_TEST_BASE_CHROME_RENDER_VIEW_TEST_H_
 
 #include <string>
 
 #include "chrome/renderer/chrome_mock_render_thread.h"
 #include "content/public/test/render_view_test.h"
 
 namespace autofill {
 class AutofillAgent;
 class TestPasswordAutofillAgent;
 class TestPasswordGenerationAgent;
 }
 
-namespace extensions {
-class Dispatcher;
-}
-
 class ChromeRenderViewTest : public content::RenderViewTest {
  public:
   ChromeRenderViewTest();
   virtual ~ChromeRenderViewTest();
 
  protected:
   // testing::Test
   virtual void SetUp() OVERRIDE;
   virtual void TearDown() OVERRIDE;
   virtual content::ContentClient* CreateContentClient() OVERRIDE;
   virtual content::ContentBrowserClient* CreateContentBrowserClient() OVERRIDE;
   virtual content::ContentRendererClient*
       CreateContentRendererClient() OVERRIDE;
 
-  extensions::Dispatcher* extension_dispatcher_;
-
   autofill::TestPasswordAutofillAgent* password_autofill_;
   autofill::TestPasswordGenerationAgent* password_generation_;
   autofill::AutofillAgent* autofill_agent_;
 
   // Naked pointer as ownership is with content::RenderViewTest::render_thread_.
   ChromeMockRenderThread* chrome_render_thread_;
 };
 
 #endif  // CHROME_TEST_BASE_CHROME_RENDER_VIEW_TEST_H_