Global cycle detection analysis.

tools/clang/blink_gc_plugin/tests/cycle_sub.h

Index: tools/clang/blink_gc_plugin/tests/cycle_sub.h
diff --git a/tools/clang/blink_gc_plugin/tests/base_requires_tracing.h b/tools/clang/blink_gc_plugin/tests/cycle_sub.h
similarity index 53%
copy from tools/clang/blink_gc_plugin/tests/base_requires_tracing.h
copy to tools/clang/blink_gc_plugin/tests/cycle_sub.h
index de3f186e3a96e72c5454efeaa285b15e8d7916c5..5137e498a9079f12c0b67c9fe9d95d98cee9efc8 100644
--- a/tools/clang/blink_gc_plugin/tests/base_requires_tracing.h
+++ b/tools/clang/blink_gc_plugin/tests/cycle_sub.h
@@ -2,34 +2,33 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef BASE_REQUIRES_TRACING_H_
-#define BASE_REQUIRES_TRACING_H_
+#ifndef CYCLE_SUB_H_
+#define CYCLE_SUB_H_
 
 #include "heap/stubs.h"
 
 namespace WebCore {
 
-class A : public GarbageCollected<A> {
+class C;
+
+// This contains a leaking cycle:
+// C -per-> A -sub-> B -ref-> C
+
+class A : public GarbageCollectedFinalized<A> {
 public:
-    virtual void trace(Visitor*);
+    virtual void trace(Visitor*) {}
 };
 
 class B : public A {
-    // Does not need trace
-};
-
-class C : public B {
 public:
-    void trace(Visitor*);
+    virtual void trace(Visitor*);
 private:
-    Member<A> m_a;
+    RefPtr<C> m_c;
 };
 
-class D : public C {
-public:
-    void trace(Visitor*);
+class C : public RefCounted<C> {
 private:
-    Member<A> m_a;
+    Persistent<A> m_a;
 };
 
 }