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 0c4bcb0d472f74923e6647bbfc2f91c988d378d9..50c33aa10252e173b47b0df22e2716818fc1ace9 100644
--- a/third_party/WebKit/Source/platform/heap/HeapTest.cpp
+++ b/third_party/WebKit/Source/platform/heap/HeapTest.cpp
@@ -6514,7 +6514,7 @@ private:
         Persistent<IntWrapper>& handle = *intWrapper;
         if (!handle) {
             handle = new IntWrapper(42);
-            handle.clearOnThreadShutdown();
+            handle.registerAsStaticReference();
         }
         return *handle;
     }