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

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

Index: chrome/browser/ui/app_list/arc/arc_package_syncable_service.cc
diff --git a/chrome/browser/ui/app_list/arc/arc_package_syncable_service.cc b/chrome/browser/ui/app_list/arc/arc_package_syncable_service.cc
index 6674fcf689b7652be593a6ad98c3112142981f78..68573ab20de7fd890d3228b0b8e15f1daca6d4e0 100644
--- a/chrome/browser/ui/app_list/arc/arc_package_syncable_service.cc
+++ b/chrome/browser/ui/app_list/arc/arc_package_syncable_service.cc
@@ -202,7 +202,7 @@ syncer::SyncError ArcPackageSyncableService::ProcessSyncChanges(
     const syncer::SyncChangeList& change_list) {
   if (!sync_processor_.get()) {
     return syncer::SyncError(FROM_HERE, syncer::SyncError::DATATYPE_ERROR,
-                             "Arc package syncable service is not started.",
+                             "ARC package syncable service is not started.",
                              syncer::ARC_PACKAGE);
   }
 
@@ -341,7 +341,7 @@ bool ArcPackageSyncableService::ProcessSyncItemSpecifics(
     const sync_pb::ArcPackageSpecifics& specifics) {
   const std::string& package_name = specifics.package_name();
   if (package_name.empty()) {
-    VLOG(2) << "Add/Update Arc package item with empty package name";
+    VLOG(2) << "Add/Update ARC package item with empty package name";
     return false;
   }
 
@@ -370,7 +370,7 @@ bool ArcPackageSyncableService::DeleteSyncItemSpecifics(
     const sync_pb::ArcPackageSpecifics& specifics) {
   const std::string& package_name = specifics.package_name();
   if (package_name.empty()) {
-    VLOG(2) << "Delete Arc package item with empty package name";
+    VLOG(2) << "Delete ARC package item with empty package name";
     return false;
   }