Remove stl_util's STLElementDeleter from sync.

components/sync/core_impl/test/fake_sync_manager.cc

Index: components/sync/core_impl/test/fake_sync_manager.cc
diff --git a/components/sync/core_impl/test/fake_sync_manager.cc b/components/sync/core_impl/test/fake_sync_manager.cc
index a102889a07ea0953b6ff3f85ea4813e6fa2e4eb3..9490c229438b101c6f63a00974fb9a020d0dc950 100644
--- a/components/sync/core_impl/test/fake_sync_manager.cc
+++ b/components/sync/core_impl/test/fake_sync_manager.cc
@@ -221,9 +221,9 @@ SyncEncryptionHandler* FakeSyncManager::GetEncryptionHandler() {
   return fake_encryption_handler_.get();
 }
 
-ScopedVector<syncer::ProtocolEvent>
+std::vector<std::unique_ptr<ProtocolEvent>>
 FakeSyncManager::GetBufferedProtocolEvents() {
-  return ScopedVector<syncer::ProtocolEvent>();
+  return std::vector<std::unique_ptr<ProtocolEvent>>();
 }
 
 std::unique_ptr<base::ListValue> FakeSyncManager::GetAllNodesForType(