views: Extract TabIconViewModel into its own header file.

chrome/browser/ui/views/tab_icon_view.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 CHROME_BROWSER_UI_VIEWS_TAB_ICON_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_TAB_ICON_VIEW_H_
 
+#include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/views/view.h"
 
 class SkBitmap;
 
+namespace chrome {
+class TabIconViewModel;
+}
+
 namespace gfx {
 class ImageSkia;
 }
 
-////////////////////////////////////////////////////////////////////////////////
-//
 // A view to display a tab favicon or a throbber.
-//
-////////////////////////////////////////////////////////////////////////////////
 class TabIconView : public views::View {
  public:
-  // Classes implement this interface to provide state for the TabIconView.
-  class TabIconViewModel {
-   public:
-    // Returns true if the TabIconView should show a loading animation.
-    virtual bool ShouldTabIconViewAnimate() const = 0;
-
-    // Returns the favicon to display in the icon view
-    virtual gfx::ImageSkia GetFaviconForTabIconView() = 0;
-  };
-
   static void InitializeIfNeeded();
 
-  explicit TabIconView(TabIconViewModel* provider);
+  explicit TabIconView(chrome::TabIconViewModel* model);
   virtual ~TabIconView();
 
   // Invoke whenever the tab state changes or the throbber should update.
   void Update();
 
   // Set the throbber to the light style (for use on dark backgrounds).
   void set_is_light(bool is_light) { is_light_ = is_light; }
 
   // Overridden from View
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual gfx::Size GetPreferredSize() OVERRIDE;
 
  private:
   void PaintThrobber(gfx::Canvas* canvas);
   void PaintFavicon(gfx::Canvas* canvas, const SkBitmap& bitmap);
   void PaintIcon(gfx::Canvas* canvas,
                  const gfx::ImageSkia& image,
                  int src_x,
                  int src_y,
                  int src_w,
                  int src_h,
                  bool filter);
 
   // Our model.
-  TabIconViewModel* model_;
+  chrome::TabIconViewModel* model_;
 
   // Whether the throbber is running.
   bool throbber_running_;
 
   // Whether we should display our light or dark style.
   bool is_light_;
 
   // Current frame of the throbber being painted. This is only used if
   // throbber_running_ is true.
   int throbber_frame_;
 
   DISALLOW_COPY_AND_ASSIGN(TabIconView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TAB_ICON_VIEW_H_