Revert 98434 - Adding a Views scrollbar implementation.

views/controls/scrollbar/native_scroll_bar_views.h

-// Copyright (c) 2011 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 VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_VIEWS_H_
-#define VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_VIEWS_H_
-#pragma once
-
-#include "ui/gfx/native_theme.h"
-#include "ui/gfx/point.h"
-#include "views/controls/button/button.h"
-#include "views/controls/scrollbar/base_scroll_bar.h"
-#include "views/controls/scrollbar/native_scroll_bar_wrapper.h"
-#include "views/view.h"
-
-namespace gfx {
-class Canvas;
-}
-
-namespace views {
-
-class NativeScrollBar;
-
-// Views implementation for the scrollbar.
-class VIEWS_EXPORT NativeScrollBarViews : public BaseScrollBar,
-                                          public ButtonListener,
-                                          public NativeScrollBarWrapper {
- public:
-  // Creates new scrollbar, either horizontal or vertical.
-  explicit NativeScrollBarViews(NativeScrollBar* native_scroll_bar);
-  virtual ~NativeScrollBarViews();
-
- private:
-  // View overrides:
-  virtual void Layout();
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
-  virtual gfx::Size GetPreferredSize();
-
-  // ScrollBar overrides:
-  virtual int GetLayoutSize() const OVERRIDE;
-
-  // BaseScrollBar overrides:
-  virtual void ScrollToPosition(int position);
-  virtual int GetScrollIncrement(bool is_page, bool is_positive);
-
-  // BaseButton::ButtonListener overrides:
-  virtual void ButtonPressed(Button* sender,
-                             const views::Event& event) OVERRIDE;
-
-  // NativeScrollBarWrapper overrides:
-  virtual int GetPosition() const;
-  virtual View* GetView();
-  virtual void Update(int viewport_size, int content_size, int current_pos);
-
-  // Returns the area for the track. This is the area of the scrollbar minus
-  // the size of the arrow buttons.
-  virtual gfx::Rect GetTrackBounds() const OVERRIDE;
-
-  // The NativeScrollBar we are bound to.
-  NativeScrollBar* native_scroll_bar_;
-
-  // The scroll bar buttons (Up/Down, Left/Right).
-  Button* prev_button_;
-  Button* next_button_;
-
-  gfx::NativeTheme::ExtraParams params_;
-  gfx::NativeTheme::Part part_;
-  gfx::NativeTheme::State state_;
-
-  DISALLOW_COPY_AND_ASSIGN(NativeScrollBarViews);
-};
-
-}  // namespace views
-
-#endif  // VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_VIEWS_H_
-