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

ui/gfx/native_theme_chromeos.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_CHROMEOS_H_
 #define UI_GFX_NATIVE_THEME_CHROMEOS_H_
 
 #include <map>
 #include "base/compiler_specific.h"
 #include "ui/gfx/native_theme_base.h"
@@ skipping 60 matching lines @@
       State state,
       const gfx::Rect& rect,
       const SliderExtraParams& slider) const OVERRIDE;
 
   // Draw the inner spin button.
   virtual void PaintInnerSpinButton(SkCanvas* canvas,
       State state,
       const gfx::Rect& rect,
       const InnerSpinButtonExtraParams& spin_button) const OVERRIDE;
 
-  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;
 
   // Draw the progress bar.
   virtual void PaintProgressBar(SkCanvas* canvas,
       State state,
       const gfx::Rect& rect,
       const ProgressBarExtraParams& progress_bar) const OVERRIDE;
 
   SkBitmap* GetHorizontalBitmapNamed(int resource_id) const;
 
   // Paint a button like rounded rect with gradient background and stroke.
   void PaintButtonLike(SkCanvas* canvas,
       State state, const gfx::Rect& rect, bool stroke_border) 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(NativeThemeChromeos);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_THEME_CHROMEOS_H_