Explicit animation support

chrome/browser/ui/touch/animation/screen_rotation_animator.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 CHROME_BROWSER_UI_TOUCH_ANIMATION_SCREEN_ROTATION_ANIMATOR_H_
+#define CHROME_BROWSER_UI_TOUCH_ANIMATION_SCREEN_ROTATION_ANIMATOR_H_
+#pragma once
+
+#include "ui/gfx/compositor/layer_animator.h"
+
+namespace views {
+class View;
+}
+
+class ScreenRotationAnimatorFactory {
+ public:
+  // The setter will not own the view, and it is required that the view
+  // outlive the setter.
+  static ui::LayerAnimator* Create(views::View* view);
+};
+
+#endif  // CHROME_BROWSER_UI_TOUCH_ANIMATION_SCREEN_ROTATION_ANIMATOR_H_