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diff --git a/chromium/ash/shelf/shelf_button.h b/chromium/ash/shelf/shelf_button.h
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+++ b/chromium/ash/shelf/shelf_button.h
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+// Copyright 2013 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_SHELF_SHELF_BUTTON_H_
+#define ASH_SHELF_SHELF_BUTTON_H_
+
+#include "ash/ash_export.h"
+#include "ui/gfx/shadow_value.h"
+#include "ui/views/controls/button/custom_button.h"
+#include "ui/views/controls/image_view.h"
+
+namespace ash {
+namespace internal {
+
+class ShelfButtonHost;
+class ShelfLayoutManager;
+
+// Button used for items on the launcher, except for the AppList.
+class ASH_EXPORT ShelfButton : public views::CustomButton {
+ public:
+  // Used to indicate the current state of the button.
+  enum State {
+    // Nothing special. Usually represents an app shortcut item with no running
+    // instance.
+    STATE_NORMAL    = 0,
+    // Button has mouse hovering on it.
+    STATE_HOVERED   = 1 << 0,
+    // Underlying LauncherItem has a running instance.
+    STATE_RUNNING   = 1 << 1,
+    // Underlying LauncherItem is active (i.e. has focus).
+    STATE_ACTIVE    = 1 << 2,
+    // Underlying LauncherItem needs user's attention.
+    STATE_ATTENTION = 1 << 3,
+    STATE_FOCUSED   = 1 << 4,
+    // Hide the status (temporarily for some animations).
+    STATE_HIDDEN = 1 << 5,
+  };
+
+  virtual ~ShelfButton();
+
+  // Called to create an instance of a ShelfButton.
+  static ShelfButton* Create(views::ButtonListener* listener,
+                             ShelfButtonHost* host,
+                             ShelfLayoutManager* shelf_layout_manager);
+
+  // Sets the image to display for this entry.
+  void SetImage(const gfx::ImageSkia& image);
+
+  // Retrieve the image to show proxy operations.
+  const gfx::ImageSkia& GetImage() const;
+
+  // |state| is or'd into the current state.
+  void AddState(State state);
+  void ClearState(State state);
+  int state() const { return state_; }
+  const ShelfLayoutManager* shelf_layout_manager() const {
+    return shelf_layout_manager_;
+  }
+
+  // Returns the bounds of the icon.
+  gfx::Rect GetIconBounds() const;
+
+  // Overrides to views::CustomButton:
+  virtual void ShowContextMenu(const gfx::Point& p,
+                               ui::MenuSourceType source_type) OVERRIDE;
+
+  // View override - needed by unit test.
+  virtual void OnMouseCaptureLost() OVERRIDE;
+
+ protected:
+  ShelfButton(views::ButtonListener* listener,
+              ShelfButtonHost* host,
+              ShelfLayoutManager* shelf_layout_manager);
+
+  // Class that draws the icon part of a button, so it can be animated
+  // independently of the rest. This can be subclassed to provide a custom
+  // implementation, by overriding CreateIconView().
+  class IconView : public views::ImageView {
+   public:
+    IconView();
+    virtual ~IconView();
+
+    void set_icon_size(int icon_size) { icon_size_ = icon_size; }
+    int icon_size() const { return icon_size_; }
+
+    // views::View overrides.
+    virtual bool HitTestRect(const gfx::Rect& rect) const OVERRIDE;
+
+   private:
+    // Set to non-zero to force icons to be resized to fit within a square,
+    // while maintaining original proportions.
+    int icon_size_;
+
+    DISALLOW_COPY_AND_ASSIGN(IconView);
+  };
+
+  // View overrides:
+  virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
+  virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
+  virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
+  virtual void OnMouseMoved(const ui::MouseEvent& event) OVERRIDE;
+  virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE;
+  virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE;
+  virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
+  virtual void Layout() OVERRIDE;
+  virtual void ChildPreferredSizeChanged(views::View* child) OVERRIDE;
+  virtual void OnFocus() OVERRIDE;
+  virtual void OnBlur() OVERRIDE;
+  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+
+  // ui::EventHandler overrides:
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
+
+  // Sets the icon image with a shadow.
+  void SetShadowedImage(const gfx::ImageSkia& bitmap);
+  // Override for custom initialization.
+  virtual void Init();
+  // Override to subclass IconView.
+  virtual IconView* CreateIconView();
+  IconView* icon_view() const { return icon_view_; }
+  ShelfButtonHost* host() const { return host_; }
+
+ private:
+  class BarView;
+
+  // Returns true if the shelf is horizontal. If this returns false the shelf is
+  // vertical.
+  bool IsShelfHorizontal() const;
+
+  // Updates the parts of the button to reflect the current |state_| and
+  // alignment. This may add or remove views, layout and paint.
+  void UpdateState();
+
+  // Updates the status bar (bitmap, orientation, visibility).
+  void UpdateBar();
+
+  ShelfButtonHost* host_;
+  IconView* icon_view_;
+  // Draws a bar underneath the image to represent the state of the application.
+  BarView* bar_;
+  // The current state of the application, multiple values of AppState are or'd
+  // together.
+  int state_;
+
+  ShelfLayoutManager* shelf_layout_manager_;
+
+  gfx::ShadowValues icon_shadows_;
+
+  // If non-null the destuctor sets this to true. This is set while the menu is
+  // showing and used to detect if the menu was deleted while running.
+  bool* destroyed_flag_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShelfButton);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_SHELF_SHELF_BUTTON_H_