Check that classes with non-trivial destructors have finalization support.

tools/clang/blink_gc_plugin/tests/class_requires_finalization_base.h

+// Copyright 2014 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 CLASS_REQUIRES_FINALIZATION_BASE_H_
+#define CLASS_REQUIRES_FINALIZATION_BASE_H_
+
+#include "heap/stubs.h"
+
+namespace WebCore {
+
+class A : public GarbageCollected<A> {
+public:
+    virtual void trace(Visitor*) {}
+};
+
+class B {
+public:
+    ~B() { /* user-declared, thus, non-trivial */ }
+};
+
+// Second base class needs finalization.
+class NeedsFinalizer : public A, public B {
+public:
+    void trace(Visitor*);
+};
+
+// Base does not need finalization.
+class DoesNotNeedFinalizer : public A {
+public:
+    void trace(Visitor*);
+};
+
+}
+
+#endif