Add brightness/grayscale animations and use them for OOBE boot transition

ash/wm/window_animations.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 ASH_WM_WINDOW_ANIMATIONS_H_
 #define ASH_WM_WINDOW_ANIMATIONS_H_
 
 #include "ash/ash_export.h"
 
 namespace aura {
@@ skipping 17 matching lines @@
                                                     // 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_WORKSPACE_SHOW,  // Windows are scaled and
                                                     // fade in.
   WINDOW_VISIBILITY_ANIMATION_TYPE_WORKSPACE_HIDE,  // Inverse of SHOW.
   WINDOW_VISIBILITY_ANIMATION_TYPE_MINIMIZE,        // Window scale/rotates down
                                                     // to its launcher icon.
+  // Fade in/out using brightness and grayscale web filters.
+  WINDOW_VISIBILITY_ANIMATION_TYPE_BRIGHTNESS_GRAYSCALE,
 };
 
 // Type of visibility change transition that a window should animate.
 // Default behavior is to animate both show and hide.
 enum WindowVisibilityAnimationTransition {
   // 0 is used as default.
   ANIMATE_SHOW = 0x1,
   ANIMATE_HIDE = 0x2,
   ANIMATE_BOTH = ANIMATE_SHOW | ANIMATE_HIDE,
   ANIMATE_NONE = 0x4,
@@ skipping 42 matching lines @@
 
 // Delay the old layer deletion so that test can verify the behavior of
 // old layer.
 ASH_EXPORT void SetDelayedOldLayerDeletionInCrossFadeForTest(bool value);
 
 }  // namespace internal
 }  // namespace ash
 
 
 #endif  // ASH_WM_WINDOW_ANIMATIONS_H_