BlinkGCPlugin: Support overloaded trace() call from template.

tools/clang/blink_gc_plugin/tests/heap/stubs.h

Index: tools/clang/blink_gc_plugin/tests/heap/stubs.h
diff --git a/tools/clang/blink_gc_plugin/tests/heap/stubs.h b/tools/clang/blink_gc_plugin/tests/heap/stubs.h
index f34fdc41cfe35854fc225cf0d23bd845d59e5cee..3220178c1422a972baf72c4b4db37b881b71ff5c 100644
--- a/tools/clang/blink_gc_plugin/tests/heap/stubs.h
+++ b/tools/clang/blink_gc_plugin/tests/heap/stubs.h
@@ -212,11 +212,17 @@ public:
 };
 
 class Visitor : public VisitorHelper<Visitor> {
- public:
+public:
     template<typename T, void (T::*method)(Visitor*)>
     void registerWeakMembers(const T* obj);
 };
 
+class InlinedGlobalMarkingVisitor
+    : public VisitorHelper<InlinedGlobalMarkingVisitor> {
+public:
+     InlinedGlobalMarkingVisitor* operator->() { return this; }
+};
+
 class GarbageCollectedMixin {
 public:
     virtual void adjustAndMark(Visitor*) const = 0;