Chromium roll (https://codereview.chromium.org/976353002)

tools/clang/blink_gc_plugin/tests/register_weak_members_template.h

+// Copyright 2015 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.
+
+#ifndef REGISTER_WEAK_MEMBERS_TEMPLATE_H_
+#define REGISTER_WEAK_MEMBERS_TEMPLATE_H_
+
+#include "heap/stubs.h"
+
+namespace blink {
+
+class X : public GarbageCollected<X> {
+ public:
+  void trace(Visitor* visitor) { traceImpl(visitor); }
+  void trace(InlinedGlobalMarkingVisitor visitor) { traceImpl(visitor); }
+
+ private:
+  template <typename VisitorDispatcher>
+  void traceImpl(VisitorDispatcher visitor) {}
+};
+
+class HasUntracedWeakMembers : public GarbageCollected<HasUntracedWeakMembers> {
+ public:
+  void trace(Visitor* visitor) { traceImpl(visitor); }
+  void trace(InlinedGlobalMarkingVisitor visitor) { traceImpl(visitor); }
+
+  // Don't have to be defined for the purpose of this test.
+  void clearWeakMembers(Visitor* visitor);
+
+ private:
+  template <typename VisitorDispatcher>
+  void traceImpl(VisitorDispatcher visitor) {
+    visitor->template registerWeakMembers<
+        HasUntracedWeakMembers,
+        &HasUntracedWeakMembers::clearWeakMembers>(this);
+  }
+
+  WeakMember<X> x_;
+};
+
+}
+
+#endif  // REGISTER_WEAK_MEMBERS_TEMPLATE_H_