ui: Move NativeTheme files into ui/base/native_theme/ directory.

ui/base/native_theme/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_
+#ifndef UI_BASE_NATIVE_THEME_NATIVE_THEME_AURA_H_
+#define UI_BASE_NATIVE_THEME_NATIVE_THEME_AURA_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "ui/gfx/native_theme_base.h"
+#include "ui/base/native_theme/native_theme_base.h"
 
-namespace gfx {
+namespace ui {
 
 // Aura implementation of native theme support.
 class NativeThemeAura : public NativeThemeBase {
  public:
   static const NativeThemeAura* instance();
 
  private:
   NativeThemeAura();
   virtual ~NativeThemeAura();
 
@@ skipping 12 matching lines @@
                                 Part direction,
                                 State state) const OVERRIDE;
   virtual void PaintScrollbarThumb(SkCanvas* canvas,
                                    Part part,
                                    State state,
                                    const gfx::Rect& rect) const OVERRIDE;
 
   DISALLOW_COPY_AND_ASSIGN(NativeThemeAura);
 };
 
-}  // namespace gfx
+}  // namespace ui
 
-#endif  // UI_GFX_NATIVE_THEME_AURA_H_
+#endif  // UI_BASE_NATIVE_THEME_NATIVE_THEME_AURA_H_