Make Clang plugin check WeakPtrFactory member order

tools/clang/plugins/tests/weak_ptr_factory.cpp

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "weak_ptr_factory.h"
+namespace should_succeed {
+
+class OnlyMember {
+  base::WeakPtrFactory<OnlyMember> factory_;
+};
+
+class FactoryLast {
+  bool bool_member_;
+  int int_member_;
+  base::WeakPtrFactory<FactoryLast> factory_;
+};
+
+class FactoryRefersToOtherType {
+  bool bool_member_;
+  base::WeakPtrFactory<bool> bool_ptr_factory_;
+};
+
+class FirstFactoryRefersToOtherType {
+  bool bool_member_;
+  base::WeakPtrFactory<bool> bool_ptr_factory_;
+  int int_member_;
+  base::WeakPtrFactory<FirstFactoryRefersToOtherType> factory_;
+};
+
+}  // namespace should_succeed
+
+namespace should_fail {
+
+class FactoryFirst {
+  base::WeakPtrFactory<FactoryFirst> factory_;
+  int int_member;
+};
+
+class FactoryMiddle {
+  bool bool_member_;
+  base::WeakPtrFactory<FactoryMiddle> factory_;
+  int int_member_;
+};
+
+}  // namespace should_fail
+
+int main() {
+}
+