Check if Member owner thread matches pointer thread and current thread

third_party/WebKit/Source/platform/heap/WrapperVisitor.h

Index: third_party/WebKit/Source/platform/heap/WrapperVisitor.h
diff --git a/third_party/WebKit/Source/platform/heap/WrapperVisitor.h b/third_party/WebKit/Source/platform/heap/WrapperVisitor.h
index a8348bde358dee20dd57ff80c744b73b38c344d3..f70edd88ef3f79f046a14a13e97a91896adf3533 100644
--- a/third_party/WebKit/Source/platform/heap/WrapperVisitor.h
+++ b/third_party/WebKit/Source/platform/heap/WrapperVisitor.h
@@ -115,6 +115,12 @@ public:
         traceWrappers(t.get());
     }
 
+    template<typename T>
+    void traceWrappers(const WeakMember<T>& t) const
+    {
+        traceWrappers(t.get());
+    }
+
     virtual void traceWrappers(const ScopedPersistent<v8::Value>* persistent) const = 0;
     virtual void traceWrappers(const ScopedPersistent<v8::Object>* persistent) const = 0;
     virtual void markWrapper(const v8::PersistentBase<v8::Object>* persistent) const = 0;