Use SkMatrix44 for the underlying implementation of ui::Transform

ui/gfx/canvas_skia.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 UI_GFX_CANVAS_SKIA_H_
 #define UI_GFX_CANVAS_SKIA_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/string16.h"
@@ skipping 140 matching lines @@
       const SkColor& color,
       const gfx::Rect& display_rect);
 #endif
   virtual void DrawFocusRect(int x, int y, int width, int height);
   virtual void TileImageInt(const SkBitmap& bitmap, int x, int y, int w, int h);
   virtual void TileImageInt(const SkBitmap& bitmap,
                             int src_x, int src_y,
                             int dest_x, int dest_y, int w, int h);
   virtual gfx::NativeDrawingContext BeginPlatformPaint();
   virtual void EndPlatformPaint();
+#if !defined(OS_MACOSX)
   virtual void Transform(const ui::Transform& transform);
+#endif
   virtual ui::TextureID GetTextureID();
   virtual CanvasSkia* AsCanvasSkia();
   virtual const CanvasSkia* AsCanvasSkia() const;
 
  private:
   // Test whether the provided rectangle intersects the current clip rect.
   bool IntersectsClipRectInt(int x, int y, int w, int h);
 
 #if defined(OS_WIN)
   // Draws text with the specified color, font and location. The text is
   // aligned to the left, vertically centered, clipped to the region. If the
   // text is too big, it is truncated and '...' is added to the end.
   void DrawStringInt(const string16& text,
                      HFONT font,
                      const SkColor& color,
                      int x, int y, int w, int h,
                      int flags);
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(CanvasSkia);
 };
 
 }  // namespace gfx;
 
 #endif  // UI_GFX_CANVAS_SKIA_H_