Reset the app list when it is shown on Windows and Linux.

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 25 matching lines @@
                     AppListModel* model);
   virtual ~AppsContainerView();
 
   // Shows the active folder content specified by |folder_item|.
   void ShowActiveFolder(AppListFolderItem* folder_item);
 
   // Shows the root level apps list. This is called when UI navigate back from
   // a folder view with |folder_item|. If |folder_item| is NULL skips animation.
   void ShowApps(AppListFolderItem* folder_item);
 
+  // Resets the app list to a state where it shows the main grid view. This is
+  // called when the user opens the launcher for the first time or when the user
+  // hides and then shows it. This is necessary because we only hide and show
+  // the launcher on Windows and Linux so we need to reset to a fresh state.
+  void ResetForShowApps();
+
   // Sets |drag_and_drop_host_| for the current app list in both
   // app_list_folder_view_ and root level apps_grid_view_.
   void SetDragAndDropHostOfCurrentAppList(
       ApplicationDragAndDropHost* drag_and_drop_host);
 
   // Transits the UI from folder view to root lelve apps grid view when
   // re-parenting a child item of |folder_item|.
   void ReparentFolderItemTransit(AppListFolderItem* folder_item);
 
   // views::View overrides:
@@ skipping 44 matching lines @@
 
   size_t top_icon_animation_pending_count_;
 
   DISALLOW_COPY_AND_ASSIGN(AppsContainerView);
 };
 
 }  // namespace app_list
 
 
 #endif  // UI_APP_LIST_VIEWS_APPS_CONTAINER_VIEW_H_