ui/gfx: Make gfx::Canvas inherit from gfx::CanvasSkia.

chrome/browser/ui/views/tabs/tab.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_TABS_TAB_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_
 #pragma once
 
 #include <string>
 
@@ skipping 50 matching lines @@
   // BaseTab overrides:
   virtual const gfx::Rect& GetTitleBounds() const OVERRIDE;
   virtual const gfx::Rect& GetIconBounds() const OVERRIDE;
   virtual void DataChanged(const TabRendererData& old) OVERRIDE;
 
   // Returns whether the Tab should display a close button.
   virtual bool ShouldShowCloseBox() const;
 
  private:
   // Overridden from views::View:
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaint(gfx::CanvasSkia* canvas) OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual void OnThemeChanged() OVERRIDE;
   virtual std::string GetClassName() const OVERRIDE;
   virtual bool HasHitTestMask() const OVERRIDE;
   virtual void GetHitTestMask(gfx::Path* path) const OVERRIDE;
   virtual bool GetTooltipTextOrigin(const gfx::Point& p,
                                     gfx::Point* origin) const OVERRIDE;
   virtual void OnMouseMoved(const views::MouseEvent& event) OVERRIDE;
 
   // Paint various portions of the Tab
-  void PaintTabBackground(gfx::Canvas* canvas);
-  void PaintInactiveTabBackgroundWithTitleChange(gfx::Canvas* canvas);
-  void PaintInactiveTabBackground(gfx::Canvas* canvas);
-  void PaintActiveTabBackground(gfx::Canvas* canvas);
+  void PaintTabBackground(gfx::CanvasSkia* canvas);
+  void PaintInactiveTabBackgroundWithTitleChange(gfx::CanvasSkia* canvas);
+  void PaintInactiveTabBackground(gfx::CanvasSkia* canvas);
+  void PaintActiveTabBackground(gfx::CanvasSkia* canvas);
 
   // Returns the number of favicon-size elements that can fit in the tab's
   // current size.
   int IconCapacity() const;
 
   // Returns whether the Tab should display a favicon.
   bool ShouldShowIcon() const;
 
   // Gets the throb value for the tab. When a tab is not selected the
   // active background is drawn at |GetThrobValue()|%. This is used for hover,
@@ skipping 42 matching lines @@
 
   // The current color of the close button.
   SkColor close_button_color_;
 
   static bool initialized_;
 
   DISALLOW_COPY_AND_ASSIGN(Tab);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_