Add the Play Store app search to the launcher.

chrome/browser/ui/app_list/app_context_menu.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 CHROME_BROWSER_UI_APP_LIST_APP_CONTEXT_MENU_H_
 #define CHROME_BROWSER_UI_APP_LIST_APP_CONTEXT_MENU_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 13 matching lines @@
   // Defines command ids, used in context menu of all types.
   enum CommandId {
     LAUNCH_NEW = 100,
     TOGGLE_PIN,
     SHOW_APP_INFO,
     OPTIONS,
     UNINSTALL,
     REMOVE_FROM_FOLDER,
     MENU_NEW_WINDOW,
     MENU_NEW_INCOGNITO_WINDOW,
+    INSTALL,
     // Order matters in USE_LAUNCH_TYPE_* and must match the LaunchType enum.
     USE_LAUNCH_TYPE_COMMAND_START = 200,
     USE_LAUNCH_TYPE_PINNED = USE_LAUNCH_TYPE_COMMAND_START,
     USE_LAUNCH_TYPE_REGULAR,
     USE_LAUNCH_TYPE_FULLSCREEN,
     USE_LAUNCH_TYPE_WINDOW,
     USE_LAUNCH_TYPE_COMMAND_END,
   };
 
   ~AppContextMenu() override;
@@ skipping 33 matching lines @@
   AppListControllerDelegate* controller_;
 
   std::unique_ptr<ui::SimpleMenuModel> menu_model_;
 
   DISALLOW_COPY_AND_ASSIGN(AppContextMenu);
 };
 
 }  // namespace app_list
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_APP_CONTEXT_MENU_H_