1 files changed, 3 insertions, 17 deletions
diff --git a/python/google/protobuf/pyext/extension_dict.h b/python/google/protobuf/pyext/extension_dict.h
index 0de2c4ee..d800d479 100644
--- a/python/google/protobuf/pyext/extension_dict.h
+++ b/python/google/protobuf/pyext/extension_dict.h
@@ -37,6 +37,7 @@
 #include <Python.h>
 
 #include <memory>
+#include <hash_map>
 
 #include <google/protobuf/pyext/message.h>
 
@@ -51,23 +52,8 @@ namespace python {
 typedef struct ExtensionDict {
   PyObject_HEAD;
 
-  // This is the top-level C++ Message object that owns the whole
-  // proto tree.  Every Python container class holds a
-  // reference to it in order to keep it alive as long as there's a
-  // Python object that references any part of the tree.
-  CMessage::OwnerRef owner;
-
-  // Weak reference to parent message. Used to make sure
-  // the parent is writable when an extension field is modified.
+  // Strong, owned reference to the parent message. Never NULL.
   CMessage* parent;
-
-  // Pointer to the C++ Message that this ExtensionDict extends.
-  // Not owned by us.
-  Message* message;
-
-  // A dict of child messages, indexed by Extension descriptors.
-  // Similar to CMessage::composite_fields.
-  PyObject* values;
 } ExtensionDict;
 
 extern PyTypeObject ExtensionDict_Type;
@@ -80,6 +66,6 @@ ExtensionDict* NewExtensionDict(CMessage *parent);
 }  // namespace extension_dict
 }  // namespace python
 }  // namespace protobuf
-
 }  // namespace google
+
 #endif  // GOOGLE_PROTOBUF_PYTHON_CPP_EXTENSION_DICT_H__