It is time.

ui/views/layout/fill_layout.h

-// 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.
-
-#ifndef UI_VIEWS_LAYOUT_FILL_LAYOUT_H_
-#define UI_VIEWS_LAYOUT_FILL_LAYOUT_H_
-
-#include "base/compiler_specific.h"
-#include "ui/views/layout/layout_manager.h"
-#include "ui/views/view.h"
-
-namespace views {
-
-///////////////////////////////////////////////////////////////////////////////
-//
-// FillLayout
-//  A simple LayoutManager that causes the associated view's one child to be
-//  sized to match the bounds of its parent.
-//
-///////////////////////////////////////////////////////////////////////////////
-class VIEWS_EXPORT FillLayout : public LayoutManager {
- public:
-  FillLayout();
-  virtual ~FillLayout();
-
-  // Overridden from LayoutManager:
-  virtual void Layout(View* host) override;
-  virtual gfx::Size GetPreferredSize(const View* host) const override;
-  virtual int GetPreferredHeightForWidth(const View* host,
-                                         int width) const override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(FillLayout);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_LAYOUT_FILL_LAYOUT_H_