Layout panels on top of their launcher icons

ash/shell/window_watcher.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 ASH_SHELL_WINDOW_WATCHER_H_
 #define ASH_SHELL_WINDOW_WATCHER_H_
 #pragma once
 
 #include <map>
 
@@ skipping 22 matching lines @@
   // aura::WindowObserver overrides:
   virtual void OnWindowAdded(aura::Window* new_window) OVERRIDE;
   virtual void OnWillRemoveWindow(aura::Window* window) OVERRIDE;
 
  private:
   typedef std::map<ash::LauncherID, aura::Window*> IDToWindow;
 
   // Window watching for newly created windows to be added to.
   aura::Window* window_;
 
+  aura::Window* panel_container_;
+
   // Maps from window to the id we gave it.
   IDToWindow id_to_window_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowWatcher);
 };
 
 }  // namespace shell
 }  // namespace ash
 
 #endif  // ASH_SHELL_WINDOW_WATCHER_H_