Remove the animation delay for showing the top level apps when user opens app list launcher.

ui/app_list/views/app_list_folder_view.h

 // Copyright 2013 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_APP_LIST_VIEWS_APP_LIST_FOLDER_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_FOLDER_VIEW_H_
 
 #include "ui/app_list/app_list_item_list_observer.h"
 #include "ui/app_list/views/apps_grid_view.h"
 #include "ui/app_list/views/folder_header_view.h"
@@ skipping 63 matching lines @@
   // for re-parenting a folder item.
   void DispatchDragEventForReparent(AppsGridView::Pointer pointer,
       const ui::LocatedEvent& event);
 
   // Dispatches EndDrag event from the hidden grid view to the root level grid
   // view for reparenting a folder item.
   // |events_forwarded_to_drag_drop_host|: True if the dragged item is dropped
   // to the drag_drop_host, eg. dropped on shelf.
   void DispatchEndDragEventForReparent(bool events_forwarded_to_drag_drop_host);
 
+  // Hides the view immediately without animation.
+  void HideViewImmediately();
+
   // views::View overrides:
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
 
   // Overridden from AppListItemListObserver:
   virtual void OnListItemRemoved(size_t index, AppListItem* item) OVERRIDE;
 
   // ui::ImplicitAnimationObserver overrides:
   virtual void OnImplicitAnimationsCompleted() OVERRIDE;
 
   AppsGridView* items_grid_view() { return items_grid_view_; }
-  bool hide_for_reparent() const { return hide_for_reparent_; }
 
  private:
   void CalculateIdealBounds();
 
   // Starts setting up drag in root level apps grid view for re-parenting a
   // folder item.
   // |drag_point_in_root_grid| is in the cooridnates of root level AppsGridView.
   void StartSetupDragInRootLevelAppsGridView(
       AppListItemView* original_drag_view,
       const gfx::Point& drag_point_in_root_grid);
@@ skipping 14 matching lines @@
   scoped_ptr<PaginationModel> pagination_model_;
 
   bool hide_for_reparent_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListFolderView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_FOLDER_VIEW_H_