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

ui/views/widget/desktop_native_widget_aura.cc

 // 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.
 
 #include "ui/views/widget/desktop_native_widget_aura.h"
 
 #include "base/bind.h"
 #include "ui/aura/client/stacking_client.h"
 #include "ui/aura/focus_manager.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/root_window_host.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
 #include "ui/base/hit_test.h"
+#include "ui/base/native_theme/native_theme.h"
 #include "ui/compositor/layer.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/ime/input_method.h"
 #include "ui/views/widget/desktop_root_window_host.h"
 #include "ui/views/widget/native_widget_aura_window_observer.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_aura_utils.h"
 
 DECLARE_EXPORTED_WINDOW_PROPERTY_TYPE(VIEWS_EXPORT,
                                       views::DesktopNativeWidgetAura*);
@@ skipping 381 matching lines @@
 
 void DesktopNativeWidgetAura::EndMoveLoop() {
   desktop_root_window_host_->EndMoveLoop();
 }
 
 void DesktopNativeWidgetAura::SetVisibilityChangedAnimationsEnabled(
     bool value) {
   desktop_root_window_host_->SetVisibilityChangedAnimationsEnabled(value);
 }
 
+ui::NativeTheme* DesktopNativeWidgetAura::GetNativeTheme() {
+  return DesktopRootWindowHost::GetNativeTheme(window_);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopNativeWidgetAura, aura::WindowDelegate implementation:
 
 gfx::Size DesktopNativeWidgetAura::GetMinimumSize() const {
   return native_widget_delegate_->GetMinimumSize();
 }
 
 void DesktopNativeWidgetAura::OnBoundsChanged(const gfx::Rect& old_bounds,
                                               const gfx::Rect& new_bounds) {
   if (old_bounds.origin() != new_bounds.origin())
@@ skipping 139 matching lines @@
     GetWidget()->non_client_view()->SchedulePaint();
 }
 
 void DesktopNativeWidgetAura::OnLostActive() {
   native_widget_delegate_->OnNativeWidgetActivationChanged(false);
   if (IsVisible() && GetWidget()->non_client_view())
     GetWidget()->non_client_view()->SchedulePaint();
 }
 
 }  // namespace views