It is time.

ui/views/window/window_shape.cc

-// 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.
-
-#include "ui/views/window/window_shape.h"
-
-#include "ui/gfx/path.h"
-#include "ui/gfx/size.h"
-
-namespace views {
-
-void GetDefaultWindowMask(const gfx::Size &size, gfx::Path *window_mask) {
-  // Redefine the window visible region for the new size.
-  window_mask->moveTo(0, 3);
-  window_mask->lineTo(1, 2);
-  window_mask->lineTo(1, 1);
-  window_mask->lineTo(2, 1);
-  window_mask->lineTo(3, 0);
-
-  window_mask->lineTo(SkIntToScalar(size.width() - 3), 0);
-  window_mask->lineTo(SkIntToScalar(size.width() - 2), 1);
-  window_mask->lineTo(SkIntToScalar(size.width() - 1), 1);
-  window_mask->lineTo(SkIntToScalar(size.width() - 1), 2);
-  window_mask->lineTo(SkIntToScalar(size.width()), 3);
-
-  window_mask->lineTo(SkIntToScalar(size.width()),
-                      SkIntToScalar(size.height() - 3));
-  window_mask->lineTo(SkIntToScalar(size.width() - 1),
-                      SkIntToScalar(size.height() - 3));
-  window_mask->lineTo(SkIntToScalar(size.width() - 1),
-                      SkIntToScalar(size.height() - 1));
-  window_mask->lineTo(SkIntToScalar(size.width() - 3),
-                      SkIntToScalar(size.height() - 2));
-  window_mask->lineTo(SkIntToScalar(size.width() - 3),
-                      SkIntToScalar(size.height()));
-
-  window_mask->lineTo(3, SkIntToScalar(size.height()));
-  window_mask->lineTo(2, SkIntToScalar(size.height() - 2));
-  window_mask->lineTo(1, SkIntToScalar(size.height() - 1));
-  window_mask->lineTo(1, SkIntToScalar(size.height() - 3));
-  window_mask->lineTo(0, SkIntToScalar(size.height() - 3));
-
-  window_mask->close();
-}
-
-} // namespace views