AppListController refactoring part 3: Switching over to use AppListShower in Ash.

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index c71e0030c4a08dc3688da601c4432110d89ac8dc..f49d3335fd3a6eadc663738e4cd543017c1a972e 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -248,12 +248,6 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
   // Returns app list target visibility.
   bool GetAppListTargetVisibility() const;
 
-  // Returns app list window or NULL if it is not visible.
-  aura::Window* GetAppListWindow();
-
-  // Returns app list view if one exists, or NULL otherwise.
-  app_list::AppListView* GetAppListView();
-
   // Returns true if a system-modal dialog window is currently open.
   bool IsSystemModalWindowOpen() const;
 
@@ -666,8 +660,6 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
   scoped_ptr<ShelfModel> shelf_model_;
   scoped_ptr<WindowPositioner> window_positioner_;
 
-  scoped_ptr<AppListController> app_list_controller_;
-
   scoped_ptr<DragDropController> drag_drop_controller_;
   scoped_ptr<ResizeShadowController> resize_shadow_controller_;
   scoped_ptr< ::wm::ShadowController> shadow_controller_;