Refactor window frame painting into a window background class

chrome/browser/ui/views/frame/opaque_browser_frame_view.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 CHROME_BROWSER_UI_VIEWS_FRAME_OPAQUE_BROWSER_FRAME_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_OPAQUE_BROWSER_FRAME_VIEW_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/views/frame/browser_frame.h"
 #include "chrome/browser/ui/views/frame/browser_non_client_frame_view.h"
 #include "chrome/browser/ui/views/tab_icon_view.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/window/non_client_view.h"
 
 class BrowserView;
 namespace views {
 class ImageButton;
+class FrameBackground;
 }
 
 class OpaqueBrowserFrameView : public BrowserNonClientFrameView,
                                public content::NotificationObserver,
                                public views::ButtonListener,
                                public TabIconView::TabIconViewModel {
  public:
   // Constructs a non-client view for an BrowserFrame.
   OpaqueBrowserFrameView(BrowserFrame* frame, BrowserView* browser_view);
   virtual ~OpaqueBrowserFrameView();
@@ skipping 93 matching lines @@
 
   // Paint various sub-components of this view.  The *FrameBorder() functions
   // also paint the background of the titlebar area, since the top frame border
   // and titlebar background are a contiguous component.
   void PaintRestoredFrameBorder(gfx::Canvas* canvas);
   void PaintMaximizedFrameBorder(gfx::Canvas* canvas);
   void PaintTitleBar(gfx::Canvas* canvas);
   void PaintToolbarBackground(gfx::Canvas* canvas);
   void PaintRestoredClientEdge(gfx::Canvas* canvas);
 
-  // Returns the properly themed bitmap and frame color, given various
-  // attributes of this view (normal browser or not, OTR or not, active or not).
+  // Compute aspects of the frame needed to paint the frame background.
+  SkColor GetFrameColor() const;
   SkBitmap* GetFrameBitmap() const;
-  SkColor GetFrameColor() const;
+  SkBitmap* GetFrameOverlayBitmap() const;
+  int GetTopAreaHeight() const;
 
   // Layout various sub-components of this view.
   void LayoutWindowControls();
   void LayoutTitleBar();
   void LayoutAvatar();
 
   // Returns the bounds of the client area for the specified view size.
   gfx::Rect CalculateClientAreaBounds(int width, int height) const;
 
   // The layout rect of the title, if visible.
   gfx::Rect title_bounds_;
 
   // The layout rect of the avatar icon, if visible.
   gfx::Rect avatar_bounds_;
 
   // Window controls.
   views::ImageButton* minimize_button_;
   views::ImageButton* maximize_button_;
   views::ImageButton* restore_button_;
   views::ImageButton* close_button_;
 
   // The Window icon.
   TabIconView* window_icon_;
 
   // The bounds of the ClientView.
   gfx::Rect client_view_bounds_;
 
   content::NotificationRegistrar registrar_;
 
+  // Background painter for the window frame.
+  scoped_ptr<views::FrameBackground> frame_background_;
+
   DISALLOW_COPY_AND_ASSIGN(OpaqueBrowserFrameView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_OPAQUE_BROWSER_FRAME_VIEW_H_