Add new style to page switcher

ui/app_list/views/page_switcher_vertical.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 UI_APP_LIST_VIEWS_PAGE_SWITCHER_VERTICAL_H_
 #define UI_APP_LIST_VIEWS_PAGE_SWITCHER_VERTICAL_H_
 
 #include "base/macros.h"
 #include "ui/app_list/pagination_model_observer.h"
 #include "ui/app_list/views/page_switcher.h"
@@ skipping 15 matching lines @@
 
   // Overridden from PageSwitcher:
   int GetPageForPoint(const gfx::Point& point) const override;
   void UpdateUIForDragPoint(const gfx::Point& point) override;
 
   // Overridden from views::View:
   gfx::Size CalculatePreferredSize() const override;
   void Layout() override;
 
  private:
-  void CalculateButtonHeightAndSpacing(int contents_height);
-
   // Overridden from views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // Overridden from PaginationModelObserver:
   void TotalPagesChanged() override;
   void SelectedPageChanged(int old_selected, int new_selected) override;
   void TransitionStarted() override;
   void TransitionChanged() override;
 
   PaginationModel* model_;  // Owned by AppsGridView.
   views::View* buttons_;    // Owned by views hierarchy.
 
   DISALLOW_COPY_AND_ASSIGN(PageSwitcherVertical);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_PAGE_SWITCHER_VERTICAL_H_