Purge the App Launcher code from Windows.

ash/shell/app_list.cc

 // 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.
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "ash/common/session/session_state_delegate.h"
@@ skipping 231 matching lines @@
   }
 
   const Users& GetUsers() const override { return users_; }
 
   bool ShouldCenterWindow() const override { return false; }
 
   app_list::AppListModel* GetModel() override { return model_.get(); }
 
   app_list::SpeechUIModel* GetSpeechUI() override { return &speech_ui_; }
 
-  void GetShortcutPathForApp(
-      const std::string& app_id,
-      const base::Callback<void(const base::FilePath&)>& callback) override {
-    callback.Run(base::FilePath());
-  }
-
   void OpenSearchResult(app_list::SearchResult* result,
                         bool auto_launch,
                         int event_flags) override {
     const ExampleSearchResult* example_result =
         static_cast<const ExampleSearchResult*>(result);
     WindowTypeShelfItem::ActivateItem(example_result->type(), event_flags);
   }
 
   void InvokeSearchResultAction(app_list::SearchResult* result,
                                 int action_index,
@@ skipping 82 matching lines @@
 };
 
 }  // namespace
 
 app_list::AppListViewDelegate* CreateAppListViewDelegate() {
   return new ExampleAppListViewDelegate;
 }
 
 }  // namespace shell
 }  // namespace ash