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

ui/base/native_theme/native_theme_android.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_ANDROID_H_
-#define UI_GFX_NATIVE_THEME_ANDROID_H_
+#ifndef UI_BASE_NATIVE_THEME_NATIVE_THEME_ANDROID_H_
+#define UI_BASE_NATIVE_THEME_NATIVE_THEME_ANDROID_H_
+#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "skia/ext/platform_canvas.h"
-#include "ui/gfx/native_theme.h"
+#include "ui/base/native_theme/native_theme.h"
 
 namespace gfx {
 class Rect;
 class Size;
+}
+
+namespace ui {
 
 // Android theming API.
 class NativeThemeAndroid : public NativeTheme {
  public:
   // Gets our singleton instance.
   static const NativeThemeAndroid* instance();
 
   // Return the size of the part.
-  virtual Size GetPartSize(Part part,
-                           State state,
-                           const ExtraParams& extra) const OVERRIDE;
+  virtual gfx::Size GetPartSize(Part part,
+                                State state,
+                                const ExtraParams& extra) const OVERRIDE;
 
   // Paint the part to the canvas.
   virtual void Paint(SkCanvas* canvas,
                      Part part,
                      State state,
                      const gfx::Rect& rect,
                      const ExtraParams& extra) const OVERRIDE;
 
   virtual SkColor GetSystemColor(ColorId color_id) const OVERRIDE;
 
@@ skipping 123 matching lines @@
   // or |max| is returned dependent on which is mostly near the |value|.
   SkScalar Clamp(SkScalar value, SkScalar min, SkScalar max) const;
 
   // Used to return the color of scrollbar based on the color of thumb and
   // track.
   SkColor OutlineColor(SkScalar* hsv1, SkScalar* hsv2) const;
 
   DISALLOW_COPY_AND_ASSIGN(NativeThemeAndroid);
 };
 
-}  // namespace gfx
+}  // namespace ui
 
-#endif  // UI_GFX_NATIVE_THEME_ANDROID_H_
+#endif  // UI_BASE_NATIVE_THEME_NATIVE_THEME_ANDROID_H_