Move file_util::Delete to the base namespace

chrome/installer/util/copy_tree_work_item.cc

Index: chrome/installer/util/copy_tree_work_item.cc
diff --git a/chrome/installer/util/copy_tree_work_item.cc b/chrome/installer/util/copy_tree_work_item.cc
index 7f82e6abbc8f23f75b324ed1f1f11d3208800922..5f0bd9371abe1760912df12e997339b22a2ce71c 100644
--- a/chrome/installer/util/copy_tree_work_item.cc
+++ b/chrome/installer/util/copy_tree_work_item.cc
@@ -109,7 +109,7 @@ void CopyTreeWorkItem::Rollback() {
   // If this does happen sometimes, we may consider using Move instead of
   // Delete here. For now we just log the error and continue with the
   // rest of rollback operation.
-  if (copied_to_dest_path_ && !file_util::Delete(dest_path_, true)) {
+  if (copied_to_dest_path_ && !base::Delete(dest_path_, true)) {
     LOG(ERROR) << "Can not delete " << dest_path_.value();
   }
   if (moved_to_backup_) {
@@ -120,7 +120,7 @@ void CopyTreeWorkItem::Rollback() {
     }
   }
   if (copied_to_alternate_path_ &&
-      !file_util::Delete(alternative_path_, true)) {
+      !base::Delete(alternative_path_, true)) {
     LOG(ERROR) << "Can not delete " << alternative_path_.value();
   }
 }