Makes the maximize/restore button handling

ash/wm/custom_frame_view_ash.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 "ash/wm/custom_frame_view_ash.h"
 
 #include "ash/wm/frame_painter.h"
+#include "ash/wm/workspace/frame_maximize_button.h"
 #include "grit/ui_resources.h"
 #include "grit/ui_strings.h"  // Accessibility names
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/widget/native_widget_aura.h"
@@ skipping 18 matching lines @@
 }
 
 CustomFrameViewAsh::~CustomFrameViewAsh() {
 }
 
 void CustomFrameViewAsh::Init(views::Widget* frame) {
   InitClass();
 
   frame_ = frame;
 
-  maximize_button_ = new views::ImageButton(this);
+  maximize_button_ = new FrameMaximizeButton(this);
   maximize_button_->SetAccessibleName(
       l10n_util::GetStringUTF16(IDS_APP_ACCNAME_MAXIMIZE));
   AddChildView(maximize_button_);
   close_button_ = new views::ImageButton(this);
   close_button_->SetAccessibleName(
       l10n_util::GetStringUTF16(IDS_APP_ACCNAME_CLOSE));
   AddChildView(close_button_);
 
   maximize_button_->SetVisible(frame_->widget_delegate()->CanMaximize());
 
@@ skipping 101 matching lines @@
 // static
 void CustomFrameViewAsh::InitClass() {
   static bool initialized = false;
   if (!initialized) {
     title_font_ = new gfx::Font(views::NativeWidgetAura::GetWindowTitleFont());
     initialized = true;
   }
 }
 
 }  // namespace ash