Don't add extra 8 byte to DOM wrappers in non-oilpan builds

Source/bindings/tests/results/V8TestInterfaceWillBeGarbageCollected.h

Index: Source/bindings/tests/results/V8TestInterfaceWillBeGarbageCollected.h
diff --git a/Source/bindings/tests/results/V8TestInterfaceWillBeGarbageCollected.h b/Source/bindings/tests/results/V8TestInterfaceWillBeGarbageCollected.h
index 6d6a5396cc3139db8e7e9d81848fc04b4fedd3e4..e232c84818976d91563104a603f552cbc2faf60e 100644
--- a/Source/bindings/tests/results/V8TestInterfaceWillBeGarbageCollected.h
+++ b/Source/bindings/tests/results/V8TestInterfaceWillBeGarbageCollected.h
@@ -37,8 +37,12 @@ public:
     static EventTarget* toEventTarget(v8::Handle<v8::Object>);
     static void constructorCallback(const v8::FunctionCallbackInfo<v8::Value>&);
     static const int eventListenerCacheIndex = v8DefaultWrapperInternalFieldCount + 0;
+#if ENABLE(OILPAN)
     static const int persistentHandleIndex = v8DefaultWrapperInternalFieldCount + 1;
     static const int internalFieldCount = v8DefaultWrapperInternalFieldCount + 2;
+#else
+    static const int internalFieldCount = v8DefaultWrapperInternalFieldCount + 2;
+#endif
     static inline void* toInternalPointer(TestInterfaceWillBeGarbageCollected* impl)
     {
         return V8EventTarget::toInternalPointer(impl);