It is time.

ui/views/shadow_border.h

-// Copyright 2013 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_VIEWS_SHADOW_BORDER_H_
-#define UI_VIEWS_SHADOW_BORDER_H_
-
-#include "third_party/skia/include/core/SkColor.h"
-#include "ui/views/border.h"
-#include "ui/views/views_export.h"
-
-namespace views {
-
-// Creates a css box-shadow like border which fades into SK_ColorTRANSPARENT.
-class VIEWS_EXPORT ShadowBorder : public views::Border {
- public:
-  ShadowBorder(int blur,
-               SkColor color,
-               int vertical_offset,
-               int horizontal_offset);
-  virtual ~ShadowBorder();
-
- protected:
-  // Overridden from views::Border:
-  virtual void Paint(const views::View& view, gfx::Canvas* canvas) override;
-  virtual gfx::Insets GetInsets() const override;
-  virtual gfx::Size GetMinimumSize() const override;
-
- private:
-  // Blur amount of the shadow in pixels. For details on how blur is defined see
-  // comments for blur_ in class ShadowValue.
-  const int blur_;
-
-  // Shadow color.
-  const SkColor color_;
-
-  // Number of pixels to shift shadow to bottom.
-  const int vertical_offset_;
-
-  // Number of pixels to shift shadow to right.
-  const int horizontal_offset_;
-
-  DISALLOW_COPY_AND_ASSIGN(ShadowBorder);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_SHADOW_BORDER_H_