ui/gfx: Drop unused args from PaintMenuBackgroundColor() and pass gfx::Size instead of gfx::Rect.

ui/gfx/native_theme_aura.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_GFX_NATIVE_THEME_AURA_H_
 #define UI_GFX_NATIVE_THEME_AURA_H_
 #pragma once
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "ui/gfx/native_theme_base.h"
 #include "ui/gfx/rect.h"
 
 class SkBitmap;
 
 namespace gfx {
 
 // Aura implementation of native theme support.
 class NativeThemeAura : public NativeThemeBase {
  public:
   static const NativeThemeAura* instance();
 
  private:
   NativeThemeAura();
   virtual ~NativeThemeAura();
 
-  // NativeTheme overrides
+  // Overridden from NativeThemeBase:
   virtual SkColor GetSystemColor(ColorId color_id) const OVERRIDE;
-
-  // NativeThemeBase overrides
-  virtual void PaintMenuPopupBackground(
-      SkCanvas* canvas,
-      State state,
-      const gfx::Rect& rect,
-      const MenuListExtraParams& menu_list) const OVERRIDE;
-
+  virtual void PaintMenuPopupBackground(SkCanvas* canvas,
+                                        const gfx::Size& size) const OVERRIDE;
   virtual void PaintScrollbarTrack(
       SkCanvas* canvas,
       Part part,
       State state,
       const ScrollbarTrackExtraParams& extra_params,
       const gfx::Rect& rect) const OVERRIDE;
-
-  virtual void PaintArrowButton(
-      SkCanvas* canvas,
-      const gfx::Rect& rect,
-      Part direction,
-      State state) const OVERRIDE;
-
-  virtual void PaintScrollbarThumb(
-      SkCanvas* canvas,
-      Part part,
-      State state,
-      const gfx::Rect& rect) const OVERRIDE;
+  virtual void PaintArrowButton(SkCanvas* canvas,
+                                const gfx::Rect& rect,
+                                Part direction,
+                                State state) const OVERRIDE;
+  virtual void PaintScrollbarThumb(SkCanvas* canvas,
+                                   Part part,
+                                   State state,
+                                   const gfx::Rect& rect) const OVERRIDE;
 
   SkBitmap* GetHorizontalBitmapNamed(int resource_id) const;
 
   // Cached images. Resource loader caches all retrieved bitmaps and keeps
   // ownership of the pointers.
   typedef std::map<int, SkBitmap*> SkImageMap;
   mutable SkImageMap horizontal_bitmaps_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeThemeAura);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_THEME_AURA_H_