Remove stl_util from sync.

components/sync/syncable/on_disk_directory_backing_store.cc

Index: components/sync/syncable/on_disk_directory_backing_store.cc
diff --git a/components/sync/syncable/on_disk_directory_backing_store.cc b/components/sync/syncable/on_disk_directory_backing_store.cc
index 4f2b1dc724b764771fc7c05c7a7fec152bfe6cbd..ba2e5d89ac2f04c909be458090c55e3408c7597b 100644
--- a/components/sync/syncable/on_disk_directory_backing_store.cc
+++ b/components/sync/syncable/on_disk_directory_backing_store.cc
@@ -6,8 +6,6 @@
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
-#include "base/stl_util.h"
-#include "components/sync/syncable/syncable-inl.h"
 
 namespace syncer {
 namespace syncable {
@@ -78,7 +76,7 @@ DirOpenResult OnDiskDirectoryBackingStore::Load(
   // The fallback: delete the current database and return a fresh one.  We can
   // fetch the user's data from the cloud.
   handles_map->clear();
-  base::STLDeleteElements(delete_journals);
+  delete_journals->clear();
 
   ResetAndCreateConnection();