Adds MUSViewsInit

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 e1fc508d798f0d5ca94f7ee9050a231c2c09ccb9..189522a6219940379ee69cd9dc74813c2c5bc858 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -59,8 +59,14 @@ void BuildRootLayers(View* view, std::vector<ui::Layer*>* layers) {
 NativeWidget* CreateNativeWidget(NativeWidget* native_widget,
                                  internal::NativeWidgetDelegate* delegate) {
   if (!native_widget) {
-    native_widget =
-        internal::NativeWidgetPrivate::CreateNativeWidget(delegate);
+    if (ViewsDelegate::GetInstance()) {
+      native_widget = ViewsDelegate::GetInstance()->CreateNativeWidget(
+          delegate);
+    }
+    if (!native_widget) {
+      native_widget =
+          internal::NativeWidgetPrivate::CreateNativeWidget(delegate);
+    }
   }
   return native_widget;
 }