Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/python/google/protobuf/pyext/extension_dict.h

Index: third_party/protobuf/python/google/protobuf/pyext/extension_dict.h
diff --git a/third_party/protobuf/python/google/protobuf/pyext/extension_dict.h b/third_party/protobuf/python/google/protobuf/pyext/extension_dict.h
deleted file mode 100644
index 7e1049f1992b6beca9e4f5fe428c532bd92e6b3d..0000000000000000000000000000000000000000
--- a/third_party/protobuf/python/google/protobuf/pyext/extension_dict.h
+++ /dev/null
@@ -1,132 +0,0 @@
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Author: anuraag@google.com (Anuraag Agrawal)
-// Author: tibell@google.com (Johan Tibell)
-
-#ifndef GOOGLE_PROTOBUF_PYTHON_CPP_EXTENSION_DICT_H__
-#define GOOGLE_PROTOBUF_PYTHON_CPP_EXTENSION_DICT_H__
-
-#include <Python.h>
-
-#include <memory>
-#ifndef _SHARED_PTR_H
-#include <google/protobuf/stubs/shared_ptr.h>
-#endif
-
-namespace google {
-namespace protobuf {
-
-class Message;
-class FieldDescriptor;
-
-using internal::shared_ptr;
-
-namespace python {
-
-struct CMessage;
-
-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.
-  shared_ptr<Message> owner;
-
-  // Weak reference to parent message. Used to make sure
-  // the parent is writable when an extension field is modified.
-  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;
-
-namespace extension_dict {
-
-// Builds an Extensions dict for a specific message.
-ExtensionDict* NewExtensionDict(CMessage *parent);
-
-// Gets the number of extension values in this ExtensionDict as a python object.
-//
-// Returns a new reference.
-PyObject* len(ExtensionDict* self);
-
-// Releases extensions referenced outside this dictionary to keep outside
-// references alive.
-//
-// Returns 0 on success, -1 on failure.
-int ReleaseExtension(ExtensionDict* self,
-                     PyObject* extension,
-                     const FieldDescriptor* descriptor);
-
-// Gets an extension from the dict for the given extension descriptor.
-//
-// Returns a new reference.
-PyObject* subscript(ExtensionDict* self, PyObject* key);
-
-// Assigns a value to an extension in the dict. Can only be used for singular
-// simple types.
-//
-// Returns 0 on success, -1 on failure.
-int ass_subscript(ExtensionDict* self, PyObject* key, PyObject* value);
-
-// Clears an extension from the dict. Will release the extension if there
-// is still an external reference left to it.
-//
-// Returns None on success.
-PyObject* ClearExtension(ExtensionDict* self,
-                                       PyObject* extension);
-
-// Checks if the dict has an extension.
-//
-// Returns a new python boolean reference.
-PyObject* HasExtension(ExtensionDict* self, PyObject* extension);
-
-// Gets an extension from the dict given the extension name as opposed to
-// descriptor.
-//
-// Returns a new reference.
-PyObject* _FindExtensionByName(ExtensionDict* self, PyObject* name);
-
-}  // namespace extension_dict
-}  // namespace python
-}  // namespace protobuf
-
-}  // namespace google
-#endif  // GOOGLE_PROTOBUF_PYTHON_CPP_EXTENSION_DICT_H__