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

ui/app_list/views/app_list_view.h

 // Copyright (c) 2012 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_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "ui/app_list/app_list_export.h"
@@ skipping 56 matching lines @@
   // it can set the host.
   void SetDragAndDropHostOfCurrentAppList(
       ApplicationDragAndDropHost* drag_and_drop_host);
 
   // Shows the UI when there are no pending icon loads. Otherwise, starts a
   // timer to show the UI when a maximum allowed wait time has expired.
   void ShowWhenReady();
 
   void Close();
 
+  // Resets the properties of the app list in preparation of showing it.
+  void ResetForShow();
+
   void UpdateBounds();
 
   // Overridden from views::View:
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void Paint(gfx::Canvas* canvas) OVERRIDE;
   virtual void OnThemeChanged() OVERRIDE;
 
   // WidgetDelegate overrides:
   virtual bool ShouldHandleSystemCommands() const OVERRIDE;
 
@@ skipping 59 matching lines @@
 
   ObserverList<AppListViewObserver> observers_;
   scoped_ptr<HideViewAnimationObserver> animation_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_