Layout panels on top of their launcher icons

ash/wm/panel_layout_manager.h

Index: ash/wm/panel_layout_manager.h
diff --git a/ash/wm/panel_layout_manager.h b/ash/wm/panel_layout_manager.h
index 6951c296822cdf8882ecb9cc47be3442fd39b1fb..4426eea58f4374a316468e3918edb14e349063a2 100644
--- a/ash/wm/panel_layout_manager.h
+++ b/ash/wm/panel_layout_manager.h
@@ -9,6 +9,7 @@
 #include <list>
 
 #include "ash/ash_export.h"
+#include "ash/launcher/launcher_icon_observer.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/aura/layout_manager.h"
@@ -22,6 +23,8 @@ class Rect;
 }
 
 namespace ash {
+class Launcher;
+
 namespace internal {
 
 // PanelLayoutManager is responsible for organizing panels within the
@@ -33,7 +36,8 @@ namespace internal {
 // its layout manager to this instance, e.g.:
 // panel_container->SetLayoutManager(new PanelLayoutManager(panel_container));
 
-class ASH_EXPORT PanelLayoutManager : public aura::LayoutManager {
+class ASH_EXPORT PanelLayoutManager : public aura::LayoutManager,
+                                      public ash::LauncherIconObserver {
  public:
   explicit PanelLayoutManager(aura::Window* panel_container);
   virtual ~PanelLayoutManager();
@@ -43,6 +47,8 @@ class ASH_EXPORT PanelLayoutManager : public aura::LayoutManager {
 
   void ToggleMinimize(aura::Window* panel);
 
+  void SetLauncher(ash::Launcher* launcher);
+
   // Overridden from aura::LayoutManager:
   virtual void OnWindowResized() OVERRIDE;
   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
@@ -52,6 +58,9 @@ class ASH_EXPORT PanelLayoutManager : public aura::LayoutManager {
   virtual void SetChildBounds(aura::Window* child,
                               const gfx::Rect& requested_bounds) OVERRIDE;
 
+  // Overriden from ash::LauncherIconObserver
+  virtual void OnLauncherIconPositionsChanged() OVERRIDE;
+
  private:
   typedef std::list<aura::Window*> PanelList;