chromeos: converts PanelLayoutManager to aura::Window

ash/wm/always_on_top_controller.h

Index: ash/wm/always_on_top_controller.h
diff --git a/ash/wm/always_on_top_controller.h b/ash/wm/always_on_top_controller.h
index 4f33eeeede88110c34b221b37a5a2011464a3add..44a26ea2669116dc5cc786a9a56b2b5e58765000 100644
--- a/ash/wm/always_on_top_controller.h
+++ b/ash/wm/always_on_top_controller.h
@@ -13,7 +13,6 @@
 
 namespace ash {
 
-class WmWindow;
 class WorkspaceLayoutManager;
 
 // AlwaysOnTopController puts window into proper containers based on its
@@ -22,11 +21,11 @@ class WorkspaceLayoutManager;
 // |always_on_top_container_|.
 class ASH_EXPORT AlwaysOnTopController : public aura::WindowObserver {
  public:
-  explicit AlwaysOnTopController(WmWindow* viewport);
+  explicit AlwaysOnTopController(aura::Window* viewport);
   ~AlwaysOnTopController() override;
 
   // Gets container for given |window| based on its "AlwaysOnTop" property.
-  WmWindow* GetContainer(WmWindow* window) const;
+  aura::Window* GetContainer(aura::Window* window) const;
 
   WorkspaceLayoutManager* GetLayoutManager() const;
 
@@ -41,7 +40,7 @@ class ASH_EXPORT AlwaysOnTopController : public aura::WindowObserver {
                                intptr_t old) override;
   void OnWindowDestroying(aura::Window* window) override;
 
-  WmWindow* always_on_top_container_;
+  aura::Window* always_on_top_container_;
 
   DISALLOW_COPY_AND_ASSIGN(AlwaysOnTopController);
 };