Add View::ReorderChildView and Widget::MoveToTop.

views/widget/native_widget_views.cc

Index: views/widget/native_widget_views.cc
diff --git a/views/widget/native_widget_views.cc b/views/widget/native_widget_views.cc
index 3f400c49c60c687dc64984a2968f293be997611e..60c6db16ad7493872f50760986c920dd017b0bee 100644
--- a/views/widget/native_widget_views.cc
+++ b/views/widget/native_widget_views.cc
@@ -42,6 +42,7 @@ void NativeWidgetViews::OnActivate(bool active) {
 
 void NativeWidgetViews::InitNativeWidget(const Widget::InitParams& params) {
   view_ = new internal::NativeWidgetView(this);
+  view_->SetPaintToTexture(true);
   host_view_->AddChildView(view_);
 
   // TODO(beng): handle parenting.
@@ -202,6 +203,10 @@ void NativeWidgetViews::MoveAbove(gfx::NativeView native_view) {
   NOTIMPLEMENTED();
 }
 
+void NativeWidgetViews::MoveToTop() {
+  host_view_->ReorderChildView(view_, -1);
+}
+
 void NativeWidgetViews::SetShape(gfx::NativeRegion region) {
   NOTIMPLEMENTED();
 }