Move file_util::Delete to the base namespace

chrome/installer/util/self_cleaning_temp_dir.cc

Index: chrome/installer/util/self_cleaning_temp_dir.cc
diff --git a/chrome/installer/util/self_cleaning_temp_dir.cc b/chrome/installer/util/self_cleaning_temp_dir.cc
index cdb61e84ba578ffffd8d5f47bbec20169ba29801..bb2fd6c6f992036ef2aab00266eaa06befd6f6aa 100644
--- a/chrome/installer/util/self_cleaning_temp_dir.cc
+++ b/chrome/installer/util/self_cleaning_temp_dir.cc
@@ -78,7 +78,7 @@ bool SelfCleaningTempDir::Delete() {
 
   // First try to recursively delete the leaf directory managed by our
   // base::ScopedTempDir.
-  if (!file_util::Delete(path(), true)) {
+  if (!base::Delete(path(), true)) {
     // That failed, so schedule the temp dir and its contents for deletion after
     // reboot.
     LOG(WARNING) << "Failed to delete temporary directory " << path().value()