DesktopAura: Track windows "owned" via the DesktopWindowTreeHost

ui/views/widget/native_widget_private.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 46 matching lines @@
       gfx::NativeWindow native_window);
 
   // Retrieves the top NativeWidgetPrivate in the hierarchy containing the given
   // NativeView, or NULL if there is no NativeWidgetPrivate that contains it.
   static NativeWidgetPrivate* GetTopLevelNativeWidget(
       gfx::NativeView native_view);
 
   static void GetAllChildWidgets(gfx::NativeView native_view,
                                  Widget::Widgets* children);
   static void GetAllOwnedWidgets(gfx::NativeView native_view,
-                                 Widget::Widgets* owned);
+                                 Widget::Widgets* owned,
+                                 bool include_toplevel);
   static void ReparentNativeView(gfx::NativeView native_view,
                                  gfx::NativeView new_parent);
 
   // Returns true if any mouse button is currently down.
   static bool IsMouseButtonDown();
 
   static gfx::FontList GetWindowTitleFontList();
 
   // Returns the NativeView with capture, otherwise NULL if there is no current
   // capture set, or if |native_view| has no root.
@@ skipping 148 matching lines @@
   virtual void OnSizeConstraintsChanged() = 0;
 
   // Repost an unhandled event to the native widget for default OS processing.
   virtual void RepostNativeEvent(gfx::NativeEvent native_event) = 0;
 
   // Returns an internal name that matches the name of the associated Widget.
   virtual std::string GetName() const = 0;
 
   // Overridden from NativeWidget:
   internal::NativeWidgetPrivate* AsNativeWidgetPrivate() override;
+
+ private:
+  // Returns the set of top-level Widgets directly owned by |this|. Called
+  // recursively by GetAllOwnedWidgets() to find Widgets indirectly owned.
+  virtual Widget::Widgets GetAllOwnedTopLevelWidgets() const = 0;
 };
 
 }  // namespace internal
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_