Purge the App Launcher code from Windows.

ui/app_list/views/app_list_item_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_ITEM_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_ITEM_VIEW_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 119 matching lines @@
                               ui::MenuSourceType source_type) override;
 
   // views::CustomButton overrides:
   void StateChanged() override;
   bool ShouldEnterPushedState(const ui::Event& event) override;
 
   // views::View overrides:
   bool OnKeyPressed(const ui::KeyEvent& event) override;
   bool OnMousePressed(const ui::MouseEvent& event) override;
   void OnMouseReleased(const ui::MouseEvent& event) override;
-  void OnMouseCaptureLost() override;
   bool OnMouseDragged(const ui::MouseEvent& event) override;
 
   // AppListItemObserver overrides:
   void ItemIconChanged() override;
   void ItemNameChanged() override;
   void ItemIsInstallingChanged() override;
   void ItemPercentDownloadedChanged() override;
   void ItemBeingDestroyed() override;
 
   const bool is_folder_;
@@ skipping 22 matching lines @@
 
   // A timer to defer showing drag UI when mouse is pressed.
   base::OneShotTimer mouse_drag_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListItemView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_ITEM_VIEW_H_