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

chrome/browser/ui/app_list/arc/arc_default_app_list.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_APP_LIST_ARC_ARC_DEFAULT_APP_LIST_H_
 #define CHROME_BROWSER_UI_APP_LIST_ARC_ARC_DEFAULT_APP_LIST_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 55 matching lines @@
   // Sets uninstalled flag for default package if it exists in default packages
   // list.
   void MaybeMarkPackageUninstalled(const std::string& package_name,
                                    bool uninstalled);
 
   // Returns set of packages which are marked not as uninstalled.
   std::unordered_set<std::string> GetActivePackages() const;
 
   const AppInfoMap& app_map() const { return apps_; }
 
-  // Marks default apps as hidden for user, for example in case Arc is managed
+  // Marks default apps as hidden for user, for example in case ARC is managed
   // and disabled.
   void set_hidden(bool hidden) { hidden_ = hidden; }
   bool is_hidden() const { return hidden_; }
 
  private:
   // Defines mapping package name to uninstalled state.
   using PackageMap = std::map<std::string, bool>;
 
   // Called when default apps are read.
   void OnAppsReady(std::unique_ptr<AppInfoMap> apps);
 
   // Unowned pointer.
   Delegate* const delegate_;
   content::BrowserContext* const context_;
   bool hidden_ = true;
 
   AppInfoMap apps_;
   PackageMap packages_;
 
   base::WeakPtrFactory<ArcDefaultAppList> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcDefaultAppList);
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_ARC_ARC_DEFAULT_APP_LIST_H_