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diff --git a/chromium/ui/wm/core/window_animations.h b/chromium/ui/wm/core/window_animations.h
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+++ b/chromium/ui/wm/core/window_animations.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 UI_WM_CORE_WINDOW_ANIMATIONS_H_
+#define UI_WM_CORE_WINDOW_ANIMATIONS_H_
+
+#include <vector>
+
+#include "ui/compositor/scoped_layer_animation_settings.h"
+#include "ui/wm/wm_export.h"
+
+namespace aura {
+class Window;
+}
+namespace base {
+class TimeDelta;
+}
+namespace gfx {
+class Rect;
+}
+namespace ui {
+class ImplicitAnimationObserver;
+class Layer;
+class LayerAnimationSequence;
+}
+
+namespace wm {
+
+// A variety of canned animations for window transitions.
+enum WindowVisibilityAnimationType {
+  WINDOW_VISIBILITY_ANIMATION_TYPE_DEFAULT = 0,     // Default. Lets the system
+                                                    // decide based on window
+                                                    // type.
+  WINDOW_VISIBILITY_ANIMATION_TYPE_DROP,            // Window shrinks in.
+  WINDOW_VISIBILITY_ANIMATION_TYPE_VERTICAL,        // Vertical Glenimation.
+  WINDOW_VISIBILITY_ANIMATION_TYPE_FADE,            // Fades in/out.
+  WINDOW_VISIBILITY_ANIMATION_TYPE_ROTATE,          // Window rotates in.
+
+  // Downstream library animations start above this point.
+  WINDOW_VISIBILITY_ANIMATION_MAX
+};
+
+// Canned animations that take effect once but don't have a symmetric pair as
+// visibility animations do.
+enum WindowAnimationType {
+  WINDOW_ANIMATION_TYPE_BOUNCE = 0,  // Window scales up and down.
+};
+
+// Type of visibility change transition that a window should animate.
+// Default behavior is to animate both show and hide.
+enum WindowVisibilityAnimationTransition {
+  ANIMATE_SHOW = 0x1,
+  ANIMATE_HIDE = 0x2,
+  ANIMATE_BOTH = ANIMATE_SHOW | ANIMATE_HIDE,
+  ANIMATE_NONE = 0x4,
+};
+
+// These two methods use int for type rather than WindowVisibilityAnimationType
+// since downstream libraries can extend the set of animations.
+WM_EXPORT void SetWindowVisibilityAnimationType(aura::Window* window, int type);
+WM_EXPORT int GetWindowVisibilityAnimationType(aura::Window* window);
+
+WM_EXPORT void SetWindowVisibilityAnimationTransition(
+    aura::Window* window,
+    WindowVisibilityAnimationTransition transition);
+
+WM_EXPORT bool HasWindowVisibilityAnimationTransition(
+    aura::Window* window,
+    WindowVisibilityAnimationTransition transition);
+
+WM_EXPORT void SetWindowVisibilityAnimationDuration(
+    aura::Window* window,
+    const base::TimeDelta& duration);
+
+WM_EXPORT base::TimeDelta GetWindowVisibilityAnimationDuration(
+    const aura::Window& window);
+
+WM_EXPORT void SetWindowVisibilityAnimationVerticalPosition(
+    aura::Window* window,
+    float position);
+
+class ImplicitHidingWindowAnimationObserver;
+// A wrapper of ui::ScopedLayerAnimationSettings for implicit hiding animations.
+// Use this to ensure that the hiding animation is visible even after
+// the window is deleted or deactivated, instead of using
+// ui::ScopedLayerAnimationSettings directly.
+class WM_EXPORT ScopedHidingAnimationSettings {
+ public:
+  explicit ScopedHidingAnimationSettings(aura::Window* window);
+  ~ScopedHidingAnimationSettings();
+
+  // Returns the wrapped ScopedLayeAnimationSettings instance.
+  ui::ScopedLayerAnimationSettings* layer_animation_settings() {
+    return &layer_animation_settings_;
+  }
+
+ private:
+  ui::ScopedLayerAnimationSettings layer_animation_settings_;
+  ImplicitHidingWindowAnimationObserver* observer_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedHidingAnimationSettings);
+};
+
+// Returns false if the |window| didn't animate.
+WM_EXPORT bool AnimateOnChildWindowVisibilityChanged(aura::Window* window,
+                                                     bool visible);
+WM_EXPORT bool AnimateWindow(aura::Window* window, WindowAnimationType type);
+
+// Returns true if window animations are disabled for |window|. Window
+// animations are enabled by default. If |window| is NULL, this just checks
+// if the global flag disabling window animations is present.
+WM_EXPORT bool WindowAnimationsDisabled(aura::Window* window);
+
+}  // namespace wm
+
+#endif  // UI_WM_CORE_WINDOW_ANIMATIONS_H_