Layout panels on top of their launcher icons

ash/shell.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_H_
 #define ASH_SHELL_H_
 #pragma once
 
 #include <utility>
 #include <vector>
@@ skipping 45 matching lines @@
 class WindowCycleController;
 
 namespace internal {
 class ActivationController;
 class AcceleratorFilter;
 class AppList;
 class DragDropController;
 class FocusCycler;
 class InputMethodEventFilter;
 class MonitorController;
+class PanelLayoutManager;
 class PartialScreenshotEventFilter;
 class ResizeShadowController;
 class RootWindowEventFilter;
 class RootWindowLayoutManager;
 class ShadowController;
 class ShelfLayoutManager;
 class StackingController;
 class TooltipController;
 class VisibilityController;
 class WindowModalityController;
@@ skipping 219 matching lines @@
 #if !defined(OS_MACOSX)
   // An event filter that pre-handles global accelerators.
   scoped_ptr<internal::AcceleratorFilter> accelerator_filter_;
 #endif
 
   // The shelf for managing the launcher and the status widget in non-compact
   // mode. Shell does not own the shelf. Instead, it is owned by container of
   // the status area.
   internal::ShelfLayoutManager* shelf_;
 
+  // Manages layout of panels. Owned by container of panels.
+  internal::PanelLayoutManager* panel_layout_manager_;
+
   ObserverList<ShellObserver> observers_;
 
   // Owned by aura::RootWindow, cached here for type safety.
   internal::RootWindowLayoutManager* root_window_layout_;
 
   // Status area with clock, Wi-Fi signal, etc.
   views::Widget* status_widget_;
 
   // System tray with clock, Wi-Fi signal, etc. (a replacement in progress for
   // |status_widget_|).
   scoped_ptr<SystemTray> tray_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_