[Extensions Toolbar] Refactor a few test classes

chrome/browser/ui/toolbar/test_toolbar_actions_bar_helper.h

-// Copyright 2014 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_BROWSER_UI_TOOLBAR_TEST_TOOLBAR_ACTIONS_BAR_HELPER_H_
-#define CHROME_BROWSER_UI_TOOLBAR_TEST_TOOLBAR_ACTIONS_BAR_HELPER_H_
-
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-
-class Browser;
-class ToolbarActionsBar;
-
-// A cross-platform container that creates and owns a ToolbarActionsBar and the
-// corresponding view.
-class TestToolbarActionsBarHelper {
- public:
-  TestToolbarActionsBarHelper() {}
-  virtual ~TestToolbarActionsBarHelper() {}
-
-  // Creates and returns a TestToolbarActionsBarHelper. If |main_bar| is
-  // non-null, the created actions bar will be in overflow mode.
-  static scoped_ptr<TestToolbarActionsBarHelper> Create(
-      Browser* browser,
-      TestToolbarActionsBarHelper* main_bar);
-
-  virtual ToolbarActionsBar* GetToolbarActionsBar() = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(TestToolbarActionsBarHelper);
-};
-
-#endif  // CHROME_BROWSER_UI_TOOLBAR_TEST_TOOLBAR_ACTIONS_BAR_HELPER_H_