Converts ash to use aura-mus

ash/mus/frame/detached_title_area_renderer.cc

Index: ash/mus/frame/detached_title_area_renderer.cc
diff --git a/ash/mus/frame/detached_title_area_renderer.cc b/ash/mus/frame/detached_title_area_renderer.cc
index 3eeabee7205896acb1775ba73d869c83d4aa7b8c..68aebbb8f6ad8e01fff2d4ccde9c26834190683a 100644
--- a/ash/mus/frame/detached_title_area_renderer.cc
+++ b/ash/mus/frame/detached_title_area_renderer.cc
@@ -5,10 +5,11 @@
 #include "ash/mus/frame/detached_title_area_renderer.h"
 
 #include "ash/common/frame/header_view.h"
+#include "ash/mus/bridge/wm_window_mus.h"
 #include "ash/mus/frame/detached_title_area_renderer_host.h"
-#include "services/ui/public/cpp/window.h"
-#include "ui/views/mus/native_widget_mus.h"
+#include "ui/aura/window.h"
 #include "ui/views/view.h"
+#include "ui/views/widget/native_widget_aura.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
@@ -17,16 +18,23 @@ namespace mus {
 DetachedTitleAreaRenderer::DetachedTitleAreaRenderer(
     DetachedTitleAreaRendererHost* host,
     views::Widget* frame,
-    ui::Window* window,
+    const gfx::Rect& bounds,
     Source source)
     : host_(host), frame_(frame), widget_(new views::Widget) {
   views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
   params.delegate = this;
   params.name = "DetachedTitleAreaRenderer";
   params.activatable = views::Widget::InitParams::ACTIVATABLE_NO;
-  params.native_widget = new views::NativeWidgetMus(
-      widget_, window, ui::mojom::CompositorFrameSinkType::UNDERLAY);
+  views::NativeWidgetAura* native_widget =
+      new views::NativeWidgetAura(widget_, true);
+  params.native_widget = native_widget;
+  // TODO: making the reveal window a sibling is likely problematic.
+  // http://crbug.com/640392, see also comment in GetVisibleBoundsInScreen().
+  params.parent = frame->GetNativeView()->parent();
+  params.bounds = bounds;
   widget_->Init(params);
+  params.parent->StackChildAbove(widget_->GetNativeView(),
+                                 frame->GetNativeView());
   HeaderView* header_view = new HeaderView(frame_);
   if (source == Source::CLIENT) {
     // HeaderView behaves differently when the widget it is associated with is
@@ -36,7 +44,7 @@ DetachedTitleAreaRenderer::DetachedTitleAreaRenderer(
     header_view->set_is_immersive_delegate(false);
   }
   widget_->SetContentsView(header_view);
-  widget_->GetRootView()->SetSize(window->bounds().size());
+  widget_->GetRootView()->SetSize(bounds.size());
   widget_->ShowInactive();
 }