It is time.

ui/wm/core/shadow_types.h

Index: ui/wm/core/shadow_types.h
diff --git a/ui/wm/core/shadow_types.h b/ui/wm/core/shadow_types.h
deleted file mode 100644
index ef6be1d18a765cf55a75218a9984cbee7ad7f7d8..0000000000000000000000000000000000000000
--- a/ui/wm/core/shadow_types.h
+++ /dev/null
@@ -1,35 +0,0 @@
-// 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_SHADOW_TYPES_H_
-#define UI_WM_CORE_SHADOW_TYPES_H_
-
-#include "ui/aura/window.h"
-#include "ui/wm/wm_export.h"
-
-namespace aura {
-class Window;
-}
-
-namespace wm {
-
-// Different types of drop shadows that can be drawn under a window by the
-// shell.  Used as a value for the kShadowTypeKey property.
-enum ShadowType {
-  // Starts at 0 due to the cast in GetShadowType().
-  SHADOW_TYPE_NONE = 0,
-  SHADOW_TYPE_RECTANGULAR,
-  SHADOW_TYPE_RECTANGULAR_ALWAYS_ACTIVE,
-};
-
-WM_EXPORT void SetShadowType(aura::Window* window, ShadowType shadow_type);
-WM_EXPORT ShadowType GetShadowType(aura::Window* window);
-
-// A property key describing the drop shadow that should be displayed under the
-// window.  If unset, no shadow is displayed.
-extern const aura::WindowProperty<ShadowType>* const kShadowTypeKey;
-
-}  // namespace wm
-
-#endif  // UI_WM_CORE_SHADOW_TYPES_H_