update_engine: use new base::Delete{File,PathRecursively}

base::DeleteFile(const FilePath& path, bool recursive) would be
deprecated in next libchrome uprev.

BUG=chromium:1144735
TEST=cros_run_unit_tests --board=eve --packages update_engine

Change-Id: Iaeac97f533a156c2c29f7ba53755664d6591b0a1
Reviewed-on: https://chromium-review.googlesource.com/c/aosp/platform/system/update_engine/+/2543515
Tested-by: Grace Cham <hscham@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
Commit-Queue: Grace Cham <hscham@chromium.org>
diff --git a/payload_consumer/postinstall_runner_action.cc b/payload_consumer/postinstall_runner_action.cc
index 91c3a64..72d1a22 100644
--- a/payload_consumer/postinstall_runner_action.cc
+++ b/payload_consumer/postinstall_runner_action.cc
@@ -284,7 +284,7 @@
 void PostinstallRunnerAction::Cleanup() {
   utils::UnmountFilesystem(fs_mount_dir_);
 #ifndef __ANDROID__
-  if (!base::DeleteFile(base::FilePath(fs_mount_dir_), false)) {
+  if (!base::DeleteFile(base::FilePath(fs_mount_dir_))) {
     PLOG(WARNING) << "Not removing temporary mountpoint " << fs_mount_dir_;
   }
 #endif  // !__ANDROID__