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

chrome/browser/ui/app_list/arc/arc_app_model_builder.cc

 // Copyright 2015 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/app_list/arc/arc_app_model_builder.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/chromeos/arc/arc_session_manager.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_list/arc/arc_app_item.h"
@@ skipping 38 matching lines @@
     const std::string& app_id,
     const ArcAppListPrefs::AppInfo& app_info) {
   if (app_info.showInLauncher)
     InsertApp(CreateApp(app_id, app_info));
 }
 
 void ArcAppModelBuilder::OnAppRemoved(const std::string& app_id) {
   const arc::ArcSessionManager* arc_session_manager =
       arc::ArcSessionManager::Get();
   DCHECK(arc_session_manager);
-  // Don't sync app removal in case it was caused by disabling Arc.
+  // Don't sync app removal in case it was caused by disabling ARC.
   const bool unsynced_change = !arc_session_manager->IsArcPlayStoreEnabled();
   RemoveApp(app_id, unsynced_change);
 }
 
 void ArcAppModelBuilder::OnAppIconUpdated(const std::string& app_id,
                                           ui::ScaleFactor scale_factor) {
   ArcAppItem* app_item = GetArcAppItem(app_id);
   if (!app_item) {
     VLOG(2) << "Could not update the icon of ARC app(" << app_id
             << ") because it was not found.";
@@ skipping 16 matching lines @@
   app_item->SetName(name);
 }
 
 void ArcAppModelBuilder::OnListItemMoved(size_t from_index,
                                          size_t to_index,
                                          app_list::AppListItem* item) {
   // On ChromeOS we expect that ArcAppModelBuilder is initialized with
   // AppListSyncableService and in this case this observer is not used.
   NOTREACHED();
 }