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

ui/views/controls/textfield/textfield.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 UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_
 #pragma once
 
 #include "build/build_config.h"
 
@@ skipping 219 matching lines @@
   NativeTextfieldWrapper* GetNativeWrapperForTesting() const {
     return native_wrapper_;
   }
 
   // Overridden from View:
   virtual void Layout() OVERRIDE;
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void AboutToRequestFocusFromTabTraversal(bool reverse) OVERRIDE;
   virtual bool SkipDefaultKeyEventProcessing(const KeyEvent& e) OVERRIDE;
   virtual void OnEnabledChanged() OVERRIDE;
-  virtual void OnPaintBackground(gfx::Canvas* canvas) OVERRIDE;
-  virtual void OnPaintFocusBorder(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaintBackground(gfx::CanvasSkia* canvas) OVERRIDE;
+  virtual void OnPaintFocusBorder(gfx::CanvasSkia* canvas) OVERRIDE;
   virtual bool OnKeyPressed(const views::KeyEvent& e) OVERRIDE;
   virtual bool OnKeyReleased(const views::KeyEvent& e) OVERRIDE;
   virtual void OnFocus() OVERRIDE;
   virtual void OnBlur() OVERRIDE;
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
   virtual ui::TextInputClient* GetTextInputClient() OVERRIDE;
 
  protected:
   virtual void ViewHierarchyChanged(bool is_add, View* parent,
                                     View* child) OVERRIDE;
@@ skipping 62 matching lines @@
 
   // The input type of this text field.
   ui::TextInputType text_input_type_;
 
   DISALLOW_COPY_AND_ASSIGN(Textfield);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_