cros: Fix mouse over-scroll animation not happening.

ui/app_list/apps_grid_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_APPS_GRID_VIEW_H_
 #define UI_APP_LIST_APPS_GRID_VIEW_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/app_list/app_list_export.h"
@@ skipping 26 matching lines @@
 
   // Sets |model| to use. Note this does not take ownership of |model|.
   void SetModel(AppListModel::Apps* model);
 
   void SetSelectedItem(AppListItemView* item);
   void ClearSelectedItem(AppListItemView* item);
   bool IsSelectedItem(const AppListItemView* item) const;
 
   void EnsureItemVisible(const AppListItemView* item);
 
+  bool HasPageTransition() const;
+
   int tiles_per_page() const { return cols_ * rows_per_page_; }
 
   // Overridden from views::View:
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
   virtual bool OnKeyReleased(const ui::KeyEvent& event) OVERRIDE;
   virtual void OnPaintFocusBorder(gfx::Canvas* canvas) OVERRIDE;
   virtual void ViewHierarchyChanged(bool is_add,
                                     views::View* parent,
@@ skipping 30 matching lines @@
   int rows_per_page_;
 
   int selected_item_index_;
 
   DISALLOW_COPY_AND_ASSIGN(AppsGridView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APPS_GRID_VIEW_H_