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diff --git a/chromium/ash/wm/gestures/long_press_affordance_handler.h b/chromium/ash/wm/gestures/long_press_affordance_handler.h
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+++ b/chromium/ash/wm/gestures/long_press_affordance_handler.h
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+// 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 ASH_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_
+#define ASH_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_
+
+#include "base/timer/timer.h"
+#include "ui/base/animation/animation_delegate.h"
+#include "ui/base/animation/linear_animation.h"
+#include "ui/gfx/point.h"
+
+namespace aura {
+class Window;
+}
+
+namespace ui {
+class LocatedEvent;
+}
+
+namespace ash {
+
+namespace test {
+class SystemGestureEventFilterTest;
+}
+
+namespace internal {
+
+// LongPressAffordanceHandler displays an animated affordance that is shown
+// on a TAP_DOWN gesture. The animation sequence consists of two parts:
+// The first part is a grow animation that starts at semi-long-press and
+// completes on a long-press gesture. The affordance animates to full size
+// during grow animation.
+// The second part is a shrink animation that start after grow and shrinks the
+// affordance out of view.
+class LongPressAffordanceHandler : public ui::AnimationDelegate,
+                                   public ui::LinearAnimation {
+ public:
+  LongPressAffordanceHandler();
+  virtual ~LongPressAffordanceHandler();
+
+  // Display or removes long press affordance according to the |event|.
+  void ProcessEvent(aura::Window* target,
+                    ui::LocatedEvent* event,
+                    int touch_id);
+
+ private:
+  friend class ash::test::SystemGestureEventFilterTest;
+
+  enum LongPressAnimationType {
+    NONE,
+    GROW_ANIMATION,
+    SHRINK_ANIMATION,
+  };
+
+  void StartAnimation();
+  void StopAnimation();
+
+  // Overridden from ui::LinearAnimation.
+  virtual void AnimateToState(double state) OVERRIDE;
+  virtual bool ShouldSendCanceledFromStop() OVERRIDE;
+
+  // Overridden from ui::AnimationDelegate.
+  virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
+
+  class LongPressAffordanceView;
+  scoped_ptr<LongPressAffordanceView> view_;
+  gfx::Point tap_down_location_;
+  int tap_down_touch_id_;
+  base::OneShotTimer<LongPressAffordanceHandler> timer_;
+  int64 tap_down_display_id_;
+  LongPressAnimationType current_animation_type_;
+
+  DISALLOW_COPY_AND_ASSIGN(LongPressAffordanceHandler);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_