It is time.

ui/compositor/float_animation_curve_adapter.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_COMPOSITOR_FLOAT_ANIMATION_CURVE_ADAPTER_H_
-#define UI_COMPOSITOR_FLOAT_ANIMATION_CURVE_ADAPTER_H_
-
-#include "base/time/time.h"
-#include "cc/animation/animation_curve.h"
-#include "ui/gfx/animation/tween.h"
-
-namespace ui {
-
-class FloatAnimationCurveAdapter : public cc::FloatAnimationCurve {
- public:
-  FloatAnimationCurveAdapter(gfx::Tween::Type tween_type,
-                             float initial_value,
-                             float target_value,
-                             base::TimeDelta duration);
-
-  ~FloatAnimationCurveAdapter() override {}
-
-  // FloatAnimationCurve implementation.
-  base::TimeDelta Duration() const override;
-  scoped_ptr<cc::AnimationCurve> Clone() const override;
-  float GetValue(base::TimeDelta t) const override;
-
- private:
-  gfx::Tween::Type tween_type_;
-  float initial_value_;
-  float target_value_;
-  base::TimeDelta duration_;
-};
-
-}  // namespace ui
-
-#endif  // UI_COMPOSITOR_FLOAT_ANIMATION_CURVE_ADAPTER_H_