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

chrome/browser/ui/views/frame/opaque_browser_frame_view.h

Index: chrome/browser/ui/views/frame/opaque_browser_frame_view.h
diff --git a/chrome/browser/ui/views/frame/opaque_browser_frame_view.h b/chrome/browser/ui/views/frame/opaque_browser_frame_view.h
index 07d1bbf79de60ca71655f87e0533feb77c948851..79322dc0598689e80d9dccdc9bf318941975ff32 100644
--- a/chrome/browser/ui/views/frame/opaque_browser_frame_view.h
+++ b/chrome/browser/ui/views/frame/opaque_browser_frame_view.h
@@ -75,7 +75,7 @@ class OpaqueBrowserFrameView : public BrowserNonClientFrameView,
   virtual void UpdateWindowIcon() OVERRIDE;
 
   // Overridden from views::View:
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaint(gfx::CanvasSkia* canvas) OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual bool HitTest(const gfx::Point& l) const OVERRIDE;
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
@@ -135,11 +135,11 @@ class OpaqueBrowserFrameView : public BrowserNonClientFrameView,
   // 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);
+  void PaintRestoredFrameBorder(gfx::CanvasSkia* canvas);
+  void PaintMaximizedFrameBorder(gfx::CanvasSkia* canvas);
+  void PaintTitleBar(gfx::CanvasSkia* canvas);
+  void PaintToolbarBackground(gfx::CanvasSkia* canvas);
+  void PaintRestoredClientEdge(gfx::CanvasSkia* canvas);
 
   // Compute aspects of the frame needed to paint the frame background.
   SkColor GetFrameColor() const;