diff --git a/ui/gfx/canvas.h b/ui/gfx/canvas.h
index 8c89d59..0149486 100644
--- a/ui/gfx/canvas.h
+++ b/ui/gfx/canvas.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -13,6 +13,10 @@
 #include "skia/ext/platform_canvas.h"
 #include "ui/gfx/native_widget_types.h"
 
+namespace ui {
+class Transform;
+}
+
 namespace gfx {
 
 class Brush;
@@ -208,6 +212,9 @@
   // returned by BeginPlatformPaint().
   virtual void EndPlatformPaint() = 0;
 
+  // Apply transformation on the canvas.
+  virtual void Transform(const ui::Transform& transform) = 0;
+
   // TODO(beng): remove this once we don't need to use any skia-specific methods
   //             through this interface.
   // A quick and dirty way to obtain the underlying SkCanvas.