mash: Remove V1 app shelf item locking; monitor running status instead.

chrome/browser/ui/ash/launcher/launcher_item_controller.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 "chrome/browser/ui/ash/launcher/launcher_item_controller.h"
 
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
 #include "chrome/common/extensions/extension_constants.h"
 
 LauncherItemController::LauncherItemController(
     const ash::AppLaunchId& app_launch_id,
     ChromeLauncherController* launcher_controller)
     : app_launch_id_(app_launch_id),
       shelf_id_(0),
       launcher_controller_(launcher_controller),
-      locked_(0),
       image_set_by_controller_(false) {}
 
 LauncherItemController::~LauncherItemController() {}
 
 MenuItemList LauncherItemController::GetAppMenuItems(int event_flags) {
   return MenuItemList();
 }
 
 AppWindowLauncherItemController*
 LauncherItemController::AsAppWindowLauncherItemController() {
   return nullptr;
 }