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

chrome/browser/ui/app_list/arc/arc_app_list_prefs.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_list_prefs.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 400 matching lines @@
   package->GetBoolean(kShouldSync, &should_sync);
   package->GetBoolean(kSystem, &system);
 
   return base::MakeUnique<PackageInfo>(package_name, package_version,
                                        last_backup_android_id, last_backup_time,
                                        should_sync, system);
 }
 
 std::vector<std::string> ArcAppListPrefs::GetAppIds() const {
   if (!IsArcEnabled()) {
-    // Default Arc apps available before OptIn.
+    // Default ARC apps available before OptIn.
     std::vector<std::string> ids;
     for (const auto& default_app : default_apps_.app_map()) {
       if (default_apps_.HasApp(default_app.first))
         ids.push_back(default_app.first);
     }
     return ids;
   }
   return GetAppIdsNoArcEnabledCheck();
 }
 
@@ skipping 10 matching lines @@
       continue;
 
     ids.push_back(app_id.key());
   }
 
   return ids;
 }
 
 std::unique_ptr<ArcAppListPrefs::AppInfo> ArcAppListPrefs::GetApp(
     const std::string& app_id) const {
-  // Information for default app is available before Arc enabled.
+  // Information for default app is available before ARC enabled.
   if (!IsArcEnabled() && !default_apps_.HasApp(app_id))
     return std::unique_ptr<AppInfo>();
 
   const base::DictionaryValue* app = nullptr;
   const base::DictionaryValue* apps = prefs_->GetDictionary(prefs::kArcApps);
   if (!apps || !apps->GetDictionaryWithoutPathExpansion(app_id, &app))
     return std::unique_ptr<AppInfo>();
 
   std::string name;
   std::string package_name;
@@ skipping 894 matching lines @@
                                           int64_t last_backup_android_id,
                                           int64_t last_backup_time,
                                           bool should_sync,
                                           bool system)
     : package_name(package_name),
       package_version(package_version),
       last_backup_android_id(last_backup_android_id),
       last_backup_time(last_backup_time),
       should_sync(should_sync),
       system(system) {}