Converts mash to use the common non-client frame

ash/mus/frame/header_painter.h

-// Copyright 2015 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_MUS_FRAME_HEADER_PAINTER_H_
-#define ASH_MUS_FRAME_HEADER_PAINTER_H_
-
-namespace gfx {
-class Canvas;
-}
-
-namespace ash {
-namespace mus {
-
-// Helper class for painting the window header.
-// TODO(sky): keep this only if we're going to actually need different
-// subclasses.
-class HeaderPainter {
- public:
-  enum Mode { MODE_ACTIVE, MODE_INACTIVE };
-
-  virtual ~HeaderPainter() {}
-
-  // Returns the header's minimum width.
-  virtual int GetMinimumHeaderWidth() const = 0;
-
-  // Paints the header.
-  virtual void PaintHeader(gfx::Canvas* canvas, Mode mode) = 0;
-
-  // Performs layout for the header.
-  virtual void LayoutHeader() = 0;
-
-  // Get the height of the header.
-  virtual int GetHeaderHeight() const = 0;
-
-  // Gets / sets how much of the header is painted. This allows the header to
-  // paint under things (like the tabstrip) which have transparent /
-  // non-painting sections. This height does not affect LayoutHeader().
-  virtual int GetHeaderHeightForPainting() const = 0;
-  virtual void SetHeaderHeightForPainting(int height_for_painting) = 0;
-
-  // Schedule a re-paint of the entire title.
-  virtual void SchedulePaintForTitle() = 0;
-};
-
-}  // namespace mus
-}  // namespace ash
-
-#endif  // ASH_MUS_FRAME_HEADER_PAINTER_H_