ui/gfx: Get rid of a few static variables from NativeTheme* type.

ui/gfx/native_theme_chromeos.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 UI_GFX_NATIVE_THEME_CHROMEOS_H_
 #define UI_GFX_NATIVE_THEME_CHROMEOS_H_
+#pragma once
 
 #include <map>
+
 #include "base/compiler_specific.h"
 #include "ui/gfx/native_theme_linux.h"
 
 class SkBitmap;
 
 class NativeThemeChromeos : public gfx::NativeThemeLinux {
+ public:
+  NativeThemeChromeos();
+  virtual ~NativeThemeChromeos();
+
  private:
   friend class NativeThemeLinux;
-  NativeThemeChromeos();
-  virtual ~NativeThemeChromeos();
 
   // NativeTheme overrides
   virtual gfx::Size GetPartSize(Part part,
                                 State state,
                                 const ExtraParams& extra) const OVERRIDE;
 
   // NativeThemeLinux overrides
   virtual void PaintScrollbarTrack(SkCanvas* canvas,
       Part part, State state,
       const ScrollbarTrackExtraParams& extra_params,
@@ skipping 58 matching lines @@
 
   // 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);
 };
 
 #endif  // UI_GFX_NATIVE_THEME_CHROMEOS_H_