Aura: Remove overlapping window mode

ash/wm/toplevel_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_TOPLEVEL_LAYOUT_MANAGER_H_
 #define ASH_WM_TOPLEVEL_LAYOUT_MANAGER_H_
 #pragma once
 
 #include "ash/ash_export.h"
 #include "ash/wm/base_layout_manager.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 
 namespace ash {
 namespace internal {
 
 class ShelfLayoutManager;
 
 // ToplevelLayoutManager is the LayoutManager installed on a container that
 // hosts what the shell considers to be top-level windows.
 //
 // ToplevelLayoutManager is used if the WorkspaceManager is not enabled and
 // compact window mode is not enabled. It is intended to implement the simplest
 // possible window management code. If you have a more complex window mode
 // please implement a new LayoutManager for it.
+//
+// TODO(jamescook): If we're happy with managed window mode, this class and
+// its tests can be deleted.
 class ASH_EXPORT ToplevelLayoutManager : public BaseLayoutManager {
  public:
   ToplevelLayoutManager();
   virtual ~ToplevelLayoutManager();
 
   void set_shelf(ShelfLayoutManager* shelf) { shelf_ = shelf; }
 
   // LayoutManager overrides:
   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
   virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
@@ skipping 16 matching lines @@
   // we're not using a shelf.
   ShelfLayoutManager* shelf_;
 
   DISALLOW_COPY_AND_ASSIGN(ToplevelLayoutManager);
 };
 
 }  // namespace ash
 }  // namespace internal
 
 #endif  // ASH_WM_TOPLEVEL_LAYOUT_MANAGER_H_