Remove stl_util's STLElementDeleter from sync.

components/sync/driver/glue/sync_backend_host.h

Index: components/sync/driver/glue/sync_backend_host.h
diff --git a/components/sync/driver/glue/sync_backend_host.h b/components/sync/driver/glue/sync_backend_host.h
index 9504eee45157f8a6e4f1ce2a870119df7e90eb15..2b2dbb28eae3e801281253f2c99decf1b1136cf9 100644
--- a/components/sync/driver/glue/sync_backend_host.h
+++ b/components/sync/driver/glue/sync_backend_host.h
@@ -208,7 +208,8 @@ class SyncBackendHost : public sync_driver::BackendDataTypeConfigurer {
   virtual void GetAllNodesForTypes(
       syncer::ModelTypeSet types,
       base::Callback<void(const std::vector<syncer::ModelType>&,
-                          ScopedVector<base::ListValue>)> type) = 0;
+                          std::vector<std::unique_ptr<base::ListValue>>)>
+          type) = 0;
 
   // Enables the sending of directory type debug counters.  Also, for every
   // time it is called, it makes an explicit request that updates to an update