Create a visible shelf and constrain window movement

ui/aura_shell/shelf_layout_manager.h

 // Copyright (c) 2011 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_AURA_SHELL_SHELF_LAYOUT_MANAGER_H_
 #define UI_AURA_SHELL_SHELF_LAYOUT_MANAGER_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 21 matching lines @@
 
   bool in_layout() const { return in_layout_; }
 
   // Stops any animations and sets the bounds of the launcher and status
   // widgets.
   void LayoutShelf();
 
   // Sets the visbility of the shelf to |visible|.
   void SetVisible(bool visible);
 
+  gfx::Rect GetLauncherBounds() const;
+
   // Overridden from aura::LayoutManager:
   virtual void OnWindowResized() OVERRIDE;
   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
   virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
   virtual void OnChildWindowVisibilityChanged(aura::Window* child,
                                               bool visible) OVERRIDE;
   virtual void SetChildBounds(aura::Window* child,
                               const gfx::Rect& requested_bounds) OVERRIDE;
 
  private:
@@ skipping 40 matching lines @@
   views::Widget* launcher_;
   views::Widget* status_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfLayoutManager);
 };
 
 }  // namespace internal
 }  // namespace aura_shell
 
 #endif  // UI_AURA_SHELL_SHELF_LAYOUT_MANAGER_H_