DesktopAura: Track windows "owned" via the DesktopWindowTreeHost

ui/views/win/hwnd_message_handler.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_WIN_HWND_MESSAGE_HANDLER_H_
 #define UI_VIEWS_WIN_HWND_MESSAGE_HANDLER_H_
 
 #include <windows.h>
 
 #include <stddef.h>
@@ skipping 118 matching lines @@
 
   void Close();
   void CloseNow();
 
   gfx::Rect GetWindowBoundsInScreen() const;
   gfx::Rect GetClientAreaBoundsInScreen() const;
   gfx::Rect GetRestoredBounds() const;
   // This accounts for the case where the widget size is the client size.
   gfx::Rect GetClientAreaBounds() const;
 
+  // Returns the owned child windows. I.e. those that report GW_OWNER as |this|.
+  std::vector<HWND> GetOwnedWindows() const;
+
   void GetWindowPlacement(gfx::Rect* bounds,
                           ui::WindowShowState* show_state) const;
 
   // Sets the bounds of the HWND to |bounds_in_pixels|. If the HWND size is not
   // changed, |force_size_changed| determines if we should pretend it is.
   void SetBounds(const gfx::Rect& bounds_in_pixels, bool force_size_changed);
 
   void SetSize(const gfx::Size& size);
   void CenterWindow(const gfx::Size& size);
 
@@ skipping 562 matching lines @@
 
   // The factory used with BEGIN_SAFE_MSG_MAP_EX.
   base::WeakPtrFactory<HWNDMessageHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HWNDMessageHandler);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIN_HWND_MESSAGE_HANDLER_H_