Sync: Support nodes with implicit permanent folders: Node Browser and out-of-order loading from DB

sync/internal_api/public/base/model_type.h

Index: sync/internal_api/public/base/model_type.h
diff --git a/sync/internal_api/public/base/model_type.h b/sync/internal_api/public/base/model_type.h
index b07f80de6fa0261c2d1e337ac7a265085ede9bbb..718100f24c2852cd342bd43991433e1292bf7c98 100644
--- a/sync/internal_api/public/base/model_type.h
+++ b/sync/internal_api/public/base/model_type.h
@@ -339,6 +339,12 @@ SYNC_EXPORT bool IsTypeWithServerGeneratedRoot(ModelType model_type);
 // that type is initially synced.
 SYNC_EXPORT bool IsTypeWithClientGeneratedRoot(ModelType model_type);
 
+// Returns true if |model_type| supports parent-child hierarchy or entries.
+SYNC_EXPORT bool TypeSupportsHierarchy(ModelType model_type);
+
+// Returns true if |model_type| supports ordering of sibling entries.
+SYNC_EXPORT bool TypeSupportsOrdering(ModelType model_type);
+
 // Returns set of model types that should be backed up before first sync.
 SYNC_EXPORT ModelTypeSet BackupTypes();