Adding unit tests for maximize menu

ash/wm/custom_frame_view_ash.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 ASH_WM_CUSTOM_FRAME_VIEW_ASH_H_
 #define ASH_WM_CUSTOM_FRAME_VIEW_ASH_H_
 
 #include "ash/ash_export.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/views/controls/button/button.h"  // ButtonListener
 #include "ui/views/window/non_client_view.h"
 
 namespace ash {
 class FramePainter;
+class FrameMaximizeButton;
 }
 namespace gfx {
 class Font;
 }
 namespace views {
 class ImageButton;
 class Widget;
 }
 
 namespace ash {
 
 // A NonClientFrameView used for dialogs and other non-browser windows.
 // See also views::CustomFrameView and BrowserNonClientFrameViewAsh.
 class ASH_EXPORT CustomFrameViewAsh : public views::NonClientFrameView,
                                       public views::ButtonListener {
  public:
   // Internal class name.
   static const char kViewClassName[];
 
   CustomFrameViewAsh();
   virtual ~CustomFrameViewAsh();
 
   // For testing.
   class TestApi {
     public:
      explicit TestApi(CustomFrameViewAsh* frame) : frame_(frame) {
      }
 
-     views::ImageButton* maximize_button() const {
+     ash::FrameMaximizeButton* maximize_button() const {
        return frame_->maximize_button_;
      }
 
     private:
      TestApi();
      CustomFrameViewAsh* frame_;
   };
 
   void Init(views::Widget* frame);
 
@@ skipping 20 matching lines @@
   virtual void ButtonPressed(views::Button* sender,
                              const ui::Event& event) OVERRIDE;
 
  private:
   // Height from top of window to top of client area.
   int NonClientTopBorderHeight() const;
 
   // Not owned.
   views::Widget* frame_;
 
-  views::ImageButton* maximize_button_;
+  ash::FrameMaximizeButton* maximize_button_;
   views::ImageButton* close_button_;
   views::ImageButton* window_icon_;
 
   scoped_ptr<FramePainter> frame_painter_;
 
   DISALLOW_COPY_AND_ASSIGN(CustomFrameViewAsh);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_CUSTOM_FRAME_VIEW_ASH_H_