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

ui/app_list/views/apps_container_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_APPS_CONTAINER_VIEW_H_
 #define UI_APP_LIST_VIEWS_APPS_CONTAINER_VIEW_H_
 
 #include "ui/app_list/app_list_folder_item.h"
 #include "ui/app_list/views/top_icon_animation_view.h"
 #include "ui/views/view.h"
@@ skipping 56 matching lines @@
   }
   AppListFolderView* app_list_folder_view() { return app_list_folder_view_; }
 
  private:
   enum ShowState {
     SHOW_APPS,
     SHOW_ACTIVE_FOLDER,
     SHOW_ITEM_REPARENT,
   };
 
-  void SetShowState(ShowState show_state);
+  void SetShowState(ShowState show_state, bool show_apps_with_animation);
 
   // Calculates the top item icon bounds in the active folder icon. The bounds
   // is relative to AppsContainerView.
   // Returns the bounds of top items' icon in sequence of top left, top right,
   // bottom left, bottom right.
   Rects GetTopItemIconBoundsInActiveFolder();
 
   // Creates the transitional views for animating the top items in the folder
   // when opening or closing a folder.
   void CreateViewsForFolderTopItemsAnimation(
       AppListFolderItem* active_folder, bool open_folder);
 
   void PrepareToShowApps(AppListFolderItem* folder_item);
 
   AppListModel* model_;
   AppsGridView* apps_grid_view_;  // Owned by views hierarchy.
   AppListFolderView* app_list_folder_view_;  // Owned by views hierarchy.
   FolderBackgroundView* folder_background_view_;  // Owned by views hierarchy.
   ShowState show_state_;
 
   // The transitional views for animating the top items in folder
   // when opening or closing a folder.
   std::vector<views::View*> top_icon_views_;
 
   size_t top_icon_animation_pending_count_;
 
+  // If true, shows top level apps with animation.
+  // Otherwise, do not animate the UI change.
+  bool show_apps_with_animation_;
+
   DISALLOW_COPY_AND_ASSIGN(AppsContainerView);
 };
 
 }  // namespace app_list
 
 
 #endif  // UI_APP_LIST_VIEWS_APPS_CONTAINER_VIEW_H_