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

chrome/browser/ui/app_list/app_list_syncable_service.cc

Index: chrome/browser/ui/app_list/app_list_syncable_service.cc
diff --git a/chrome/browser/ui/app_list/app_list_syncable_service.cc b/chrome/browser/ui/app_list/app_list_syncable_service.cc
index 0ffd46e892f7aec1fbc9e6ede5525da0966bc7d0..03c9ddcdc2c25be5ac51b2d704cb9c8ef7a1a6ac 100644
--- a/chrome/browser/ui/app_list/app_list_syncable_service.cc
+++ b/chrome/browser/ui/app_list/app_list_syncable_service.cc
@@ -261,7 +261,7 @@ class AppListSyncableService::ModelObserver : public AppListModelObserver {
 
 #if defined(OS_CHROMEOS)
     if (item->GetItemType() == ArcAppItem::kItemType) {
-      // Don't sync remove changes coming as result of disabling Arc.
+      // Don't sync remove changes coming as result of disabling ARC.
       const arc::ArcSessionManager* arc_session_manager =
           arc::ArcSessionManager::Get();
       DCHECK(arc_session_manager);