DesktopAura: Track windows "owned" via the DesktopWindowTreeHost

ui/views/widget/native_widget_mac.mm

Index: ui/views/widget/native_widget_mac.mm
diff --git a/ui/views/widget/native_widget_mac.mm b/ui/views/widget/native_widget_mac.mm
index eb23991cb9e43a69703bc5f29026dbe52852302f..54c7fef529189da2a444213316aea4076b00cf50 100644
--- a/ui/views/widget/native_widget_mac.mm
+++ b/ui/views/widget/native_widget_mac.mm
@@ -609,6 +609,10 @@ std::string NativeWidgetMac::GetName() const {
   return name_;
 }
 
+Widget::Widgets NativeWidgetMac::GetAllOwnedTopLevelWidgets() const {
+  return Widget::Widgets();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetMac, protected:
 
@@ -727,7 +731,12 @@ void NativeWidgetPrivate::GetAllChildWidgets(gfx::NativeView native_view,
 
 // static
 void NativeWidgetPrivate::GetAllOwnedWidgets(gfx::NativeView native_view,
-                                             Widget::Widgets* owned) {
+                                             Widget::Widgets* owned,
+                                             bool include_toplevel) {
+  // All Widgets are toplevel on Mac.
+  if (!include_toplevel)
+    return;
+
   BridgedNativeWidget* bridge =
       NativeWidgetMac::GetBridgeForNativeWindow([native_view window]);
   if (!bridge) {