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

ui/views/widget/widget.cc

Index: ui/views/widget/widget.cc
diff --git a/ui/views/widget/widget.cc b/ui/views/widget/widget.cc
index a4d48bb35890a35b89adf99bfa3c38be3f5ff9dd..41752a52a98e75caf7bfbccd32030d6b24dc6e0d 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -672,6 +672,10 @@ ui::ThemeProvider* Widget::GetThemeProvider() const {
   return default_theme_provider_.get();
 }
 
+ui::NativeTheme* Widget::GetNativeTheme() {
+  return native_widget_->GetNativeTheme();
+}
+
 FocusManager* Widget::GetFocusManager() {
   Widget* toplevel_widget = GetTopLevelWidget();
   return toplevel_widget ? toplevel_widget->focus_manager_.get() : NULL;