Clean up frame code a bit:

ui/views/window/frame_background.h

 // 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_VIEWS_WINDOW_FRAME_BACKGROUND_H_
 #define UI_VIEWS_WINDOW_FRAME_BACKGROUND_H_
 
 #include "base/macros.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/views/views_export.h"
@@ skipping 46 matching lines @@
   // Sets images used when drawing the corners of the frame.
   // Caller owns the memory.
   void SetCornerImages(const gfx::ImageSkia* top_left,
                        const gfx::ImageSkia* top_right,
                        const gfx::ImageSkia* bottom_left,
                        const gfx::ImageSkia* bottom_right);
 
   // Paints the border for a standard, non-maximized window.  Also paints the
   // background of the title bar area, since the top frame border and the
   // title bar background are a contiguous component.
-  void PaintRestored(gfx::Canvas* canvas, View* view) const;
+  void PaintRestored(gfx::Canvas* canvas, const View* view) const;
 
   // Paints the border for a maximized window, which does not include the
   // window edges.
-  void PaintMaximized(gfx::Canvas* canvas, View* view) const;
+  void PaintMaximized(gfx::Canvas* canvas, const View* view) const;
 
  private:
   // Fills the frame area with the frame color.
-  void PaintFrameColor(gfx::Canvas* canvas, View* view) const;
+  void PaintFrameColor(gfx::Canvas* canvas, const View* view) const;
 
   SkColor frame_color_;
   const gfx::ImageSkia* theme_image_;
   gfx::ImageSkia* theme_overlay_image_;
   int top_area_height_;
 
   // Images for the sides of the frame.
   const gfx::ImageSkia* left_edge_;
   const gfx::ImageSkia* top_edge_;
   const gfx::ImageSkia* right_edge_;
   const gfx::ImageSkia* bottom_edge_;
 
   // Images for the corners of the frame.
   const gfx::ImageSkia* top_left_corner_;
   const gfx::ImageSkia* top_right_corner_;
   const gfx::ImageSkia* bottom_left_corner_;
   const gfx::ImageSkia* bottom_right_corner_;
 
   // Vertical inset for theme image when drawing maximized.
   int maximized_top_inset_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameBackground);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WINDOW_FRAME_BACKGROUND_H_