Add panels as a single group of windows per display for overview window cycling.

ash/wm/panels/panel_layout_manager.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_WM_PANELS_PANEL_LAYOUT_MANAGER_H_
 #define ASH_WM_PANELS_PANEL_LAYOUT_MANAGER_H_
 
 #include <list>
 
 #include "ash/ash_export.h"
@@ skipping 53 matching lines @@
   virtual ~PanelLayoutManager();
 
   // Call Shutdown() before deleting children of panel_container.
   void Shutdown();
 
   void StartDragging(aura::Window* panel);
   void FinishDragging();
 
   void ToggleMinimize(aura::Window* panel);
 
+  // Returns the callout widget (arrow) for |panel|.
+  views::Widget* GetCalloutWidgetForPanel(aura::Window* panel);
+
   ash::Launcher* launcher() { return launcher_; }
   void SetLauncher(ash::Launcher* launcher);
 
   // Overridden from aura::LayoutManager:
   virtual void OnWindowResized() OVERRIDE;
   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
   virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
   virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE;
   virtual void OnChildWindowVisibilityChanged(aura::Window* child,
                                               bool visibile) OVERRIDE;
@@ skipping 93 matching lines @@
   aura::Window* last_active_panel_;
   base::WeakPtrFactory<PanelLayoutManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelLayoutManager);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_PANELS_PANEL_LAYOUT_MANAGER_H_