s/\bArc\b/ARC/g for ARC related code.

chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_controller.cc

 // Copyright 2016 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/arc_app_deferred_launcher_controller.h"
 
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/chromeos/arc/arc_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_list/arc/arc_app_utils.h"
@@ skipping 128 matching lines @@
 
 void ArcAppDeferredLauncherController::OnAppRemoved(const std::string& app_id) {
   Close(app_id);
 }
 
 void ArcAppDeferredLauncherController::OnArcPlayStoreEnabledChanged(
     bool enabled) {
   if (enabled)
     return;
 
-  // If Arc was disabled, remove all deferred launch requests.
+  // If ARC was disabled, remove all deferred launch requests.
   while (!app_controller_map_.empty())
     Close(app_controller_map_.begin()->first);
 }
 
 bool ArcAppDeferredLauncherController::HasApp(const std::string& app_id) const {
   const std::string shelf_app_id =
       ArcAppWindowLauncherController::GetShelfAppIdFromArcAppId(app_id);
   return app_controller_map_.count(shelf_app_id);
 }
 
@@ skipping 51 matching lines @@
   } else {
     owner_->SetItemController(shelf_id, controller);
     owner_->SetItemStatus(shelf_id, ash::STATUS_RUNNING);
   }
 
   if (app_controller_map_.empty())
     RegisterNextUpdate();
 
   app_controller_map_[shelf_app_id] = controller;
 }