Unify and generalize thread static persistent finalization.

third_party/WebKit/Source/platform/heap/HeapTest.cpp

Index: third_party/WebKit/Source/platform/heap/HeapTest.cpp
diff --git a/third_party/WebKit/Source/platform/heap/HeapTest.cpp b/third_party/WebKit/Source/platform/heap/HeapTest.cpp
index 69bd7ef9b8ed7af7e59e385809d0d703b6f8811f..30bdad7d5cacf83f50b0a21da616a9df60562c2a 100644
--- a/third_party/WebKit/Source/platform/heap/HeapTest.cpp
+++ b/third_party/WebKit/Source/platform/heap/HeapTest.cpp
@@ -6522,7 +6522,7 @@ private:
         Persistent<IntWrapper>& handle = *intWrapper;
         if (!handle) {
             handle = new IntWrapper(42);
-            handle.clearOnThreadShutdown();
+            handle.registerAsStaticReference();
         }
         return *handle;
     }