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

ui/gfx/native_theme_linux.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_LINUX_H_
 #define UI_GFX_NATIVE_THEME_LINUX_H_
 
 #include "base/basictypes.h"
 #include "skia/ext/platform_canvas.h"
 #include "ui/gfx/native_theme.h"
 
 namespace gfx {
 class Rect;
 class Size;
 
 // Linux theming API.
 class NativeThemeLinux : public NativeTheme {
  public:
+  NativeThemeLinux();
+  virtual ~NativeThemeLinux();
+
   // Gets our singleton instance.
   static const NativeThemeLinux* instance();
 
   // NativeTheme implementation:
   virtual gfx::Size GetPartSize(Part part,
                                 State state,
                                 const ExtraParams& extra) const;
   virtual void Paint(SkCanvas* canvas,
                      Part part,
                      State state,
                      const gfx::Rect& rect,
                      const ExtraParams& extra) const;
 
  protected:
-  NativeThemeLinux();
-  virtual ~NativeThemeLinux();
-
   // Draw the arrow. Used by scrollbar and inner spin button.
   virtual void PaintArrowButton(
       SkCanvas* gc,
       const gfx::Rect& rect,
       Part direction,
       State state) const;
   // Paint the scrollbar track. Done before the thumb so that it can contain
   // alpha.
   virtual void PaintScrollbarTrack(SkCanvas* canvas,
       Part part,
@@ skipping 90 matching lines @@
 
   static unsigned int scrollbar_width_;
   static unsigned int button_length_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeThemeLinux);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_THEME_LINUX_H_