Make infobar background gray

chrome/browser/ui/views/infobars/infobar_background.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 CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_BACKGROUND_H_
 #define CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_BACKGROUND_H_
 #pragma once
 
 #include "chrome/browser/tab_contents/infobar_delegate.h"
 #include "views/background.h"
 
 class InfoBarBackground : public views::Background {
  public:
   explicit InfoBarBackground(InfoBarDelegate::Type infobar_type);
   virtual ~InfoBarBackground();
 
   void set_separator_color(SkColor color) { separator_color_ = color; }
-  static SkColor GetTopColor(InfoBarDelegate::Type infobar_type);
-  static SkColor GetBottomColor(InfoBarDelegate::Type infobar_type);
 
  private:
   // views::Background:
   virtual void Paint(gfx::Canvas* canvas, views::View* view) const;
 
   SkColor separator_color_;
   SkColor top_color_;
   SkColor bottom_color_;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarBackground);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_BACKGROUND_H_