Move DeleteAfterReboot and Move to base namespace

chrome/installer/util/delete_tree_work_item.cc

Index: chrome/installer/util/delete_tree_work_item.cc
diff --git a/chrome/installer/util/delete_tree_work_item.cc b/chrome/installer/util/delete_tree_work_item.cc
index 4aaf151aefe8b2a9727986b85326273ebebc420c..a5ccf4d3240a5fa794b08a88e41771b3a4cef238 100644
--- a/chrome/installer/util/delete_tree_work_item.cc
+++ b/chrome/installer/util/delete_tree_work_item.cc
@@ -144,7 +144,7 @@ void DeleteTreeWorkItem::Rollback() {
     DCHECK(!backup_path_.path().empty());
     base::FilePath backup = backup_path_.path().Append(root_path_.BaseName());
     if (file_util::PathExists(backup))
-      file_util::Move(backup, root_path_);
+      base::Move(backup, root_path_);
   }
 
   for (ptrdiff_t i = 0; i != num_key_files_; ++i) {
@@ -154,7 +154,7 @@ void DeleteTreeWorkItem::Rollback() {
       base::FilePath backup_file =
           backup_dir.path().Append(key_file.BaseName());
       if (file_util::PathExists(backup_file) &&
-          !file_util::Move(backup_file, key_file)) {
+          !base::Move(backup_file, key_file)) {
         // This could happen if we could not delete the key file to begin with.
         PLOG(WARNING) << "Rollback: Failed to move backup file back in place: "
                       << backup_file.value() << " to " << key_file.value();