Adds View::GetNativeTheme() to get the NativeTheme. The interesting

ui/views/widget/native_widget_private.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_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_
 
 #include "base/string16.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/views/ime/input_method_delegate.h"
 #include "ui/views/widget/native_widget.h"
 
 namespace gfx {
 class ImageSkia;
 class Rect;
 }
 
 namespace ui {
+class NativeTheme;
 class OSExchangeData;
 }
 
 namespace views {
 class InputMethod;
 class TooltipManager;
 namespace internal {
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetPrivate interface
@@ skipping 177 matching lines @@
                             int operation) = 0;
   virtual void SchedulePaintInRect(const gfx::Rect& rect) = 0;
   virtual void SetCursor(gfx::NativeCursor cursor) = 0;
   virtual void ClearNativeFocus() = 0;
   virtual gfx::Rect GetWorkAreaBoundsInScreen() const = 0;
   virtual void SetInactiveRenderingDisabled(bool value) = 0;
   virtual Widget::MoveLoopResult RunMoveLoop(
       const gfx::Vector2d& drag_offset) = 0;
   virtual void EndMoveLoop() = 0;
   virtual void SetVisibilityChangedAnimationsEnabled(bool value) = 0;
+  virtual ui::NativeTheme* GetNativeTheme() = 0;
 
   // Overridden from NativeWidget:
   virtual internal::NativeWidgetPrivate* AsNativeWidgetPrivate() OVERRIDE;
 };
 
 }  // namespace internal
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_