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

Source/bindings/v8/V8DOMWrapper.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 69 matching lines @@
     {
         // see V8WindowShell::installDOMWindow() comment for why this version is needed and safe.
         ASSERT(wrapper->InternalFieldCount() >= 2);
         ASSERT(object);
         ASSERT(wrapperTypeInfo);
 #if ENABLE(OILPAN)
         ASSERT(wrapperTypeInfo->gcType != RefCountedObject);
 #else
         ASSERT(wrapperTypeInfo->gcType == RefCountedObject || wrapperTypeInfo->gcType == WillBeGarbageCollectedObject);
 #endif
+
+        // Clear out the last internal field, which is assumed to contain a valid persistent pointer value.
+        if (wrapperTypeInfo->gcType == GarbageCollectedObject) {
+            wrapper->SetAlignedPointerInInternalField(wrapper->InternalFieldCount() - 1, 0);
+        } else if (wrapperTypeInfo->gcType == WillBeGarbageCollectedObject) {
+#if ENABLE(OILPAN)
+            wrapper->SetAlignedPointerInInternalField(wrapper->InternalFieldCount() - 1, 0);
+#endif
+        }
         wrapper->SetAlignedPointerInInternalField(v8DOMWrapperObjectIndex, object);
         wrapper->SetAlignedPointerInInternalField(v8DOMWrapperTypeIndex, const_cast<WrapperTypeInfo*>(wrapperTypeInfo));
-        // Clear out the last internal field, which is assumed to contain a valid persistent pointer value.
-        wrapper->SetAlignedPointerInInternalField(wrapper->InternalFieldCount() - 1, 0);
     }
 
     inline void V8DOMWrapper::setNativeInfoWithPersistentHandle(v8::Handle<v8::Object> wrapper, const WrapperTypeInfo* wrapperTypeInfo, void* object, PersistentNode* handle)
     {
         ASSERT(wrapper->InternalFieldCount() >= 3);
         ASSERT(object);
         ASSERT(wrapperTypeInfo);
         ASSERT(wrapperTypeInfo->gcType != RefCountedObject);
         wrapper->SetAlignedPointerInInternalField(v8DOMWrapperObjectIndex, object);
         wrapper->SetAlignedPointerInInternalField(v8DOMWrapperTypeIndex, const_cast<WrapperTypeInfo*>(wrapperTypeInfo));
@@ skipping 62 matching lines @@
         v8::Handle<v8::Context> context() const { return m_context; }
 
     private:
         bool m_didEnterContext;
         v8::Handle<v8::Context> m_context;
     };
 
 }
 
 #endif // V8DOMWrapper_h