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diff --git a/chrome/browser/chromeos/panels/panel_scroller.h b/chrome/browser/chromeos/panels/panel_scroller.h
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+++ b/chrome/browser/chromeos/panels/panel_scroller.h
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+// Copyright (c) 2010 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_CHROMEOS_PANELS_PANEL_SCROLLER_H_
+#define CHROME_BROWSER_CHROMEOS_PANELS_PANEL_SCROLLER_H_
+
+#include <vector>
+
+#include "app/slide_animation.h"
+#include "base/basictypes.h"
+#include "views/view.h"
+
+class PanelScrollerHeader;
+
+class PanelScroller : public views::View, public AnimationDelegate {
+ public:
+  PanelScroller();
+  ~PanelScroller();
+
+  static PanelScroller* CreateWindow();
+
+  // View overrides.
+  virtual void ViewHierarchyChanged(bool is_add,
+                                    views::View* parent,
+                                    views::View* child);
+  virtual gfx::Size GetPreferredSize();
+  virtual void Layout();
+  virtual bool OnMousePressed(const views::MouseEvent& event);
+  virtual bool OnMouseDragged(const views::MouseEvent& event);
+  virtual void OnMouseReleased(const views::MouseEvent& event, bool canceled);
+
+  // Called when a panel header is clicked with the affected container. This
+  // function will make sure the panel is fully visible.
+  void HeaderClicked(PanelScrollerHeader* source);
+
+ private:
+  struct Panel;
+
+  // AnimationDelegate overrides.
+  virtual void AnimationProgressed(const Animation* animation);
+
+  // Scrolls to the panel at the given index. It will be moved to the top.
+  void ScrollToPanel(int index);
+
+  // All panels in this scroller.
+  std::vector<Panel*> panels_;
+
+  // Height in pixels of the headers above each panel.
+  int divider_height_;
+
+  bool needs_layout_;
+
+  // The current scroll position.
+  int scroll_pos_;
+
+  SlideAnimation animation_;
+
+  // When animating a scroll, these indicate the beginning and ending of the
+  // scroll. The scroll_pos_ always indicates the current one.
+  int animated_scroll_begin_;
+  int animated_scroll_end_;
+
+  DISALLOW_COPY_AND_ASSIGN(PanelScroller);
+};
+
+#endif  // CHROME_BROWSER_CHROMEOS_PANELS_PANEL_SCROLLER_H_
+