First part of work to move V8 binding integrity off of vtables.

Source/WebCore/fileapi/Blob.cpp

 /*
  * Copyright (C) 2010 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 36 matching lines @@
     SliceWithoutPrefix,
     SliceWithPrefix,
     SliceHistogramEnumMax,
 };
 
 } // namespace
 
 Blob::Blob()
     : m_size(0)
 {
+    ScriptWrappable::init(this);
     OwnPtr<BlobData> blobData = BlobData::create();
 
     // Create a new internal URL and register it with the provided blob data.
     m_internalURL = BlobURL::createInternalURL();
     ThreadableBlobRegistry::registerBlobURL(m_internalURL, blobData.release());
 }
 
 Blob::Blob(PassOwnPtr<BlobData> blobData, long long size)
     : m_type(blobData->contentType())
     , m_size(size)
 {
     ASSERT(blobData);
+    ScriptWrappable::init(this);
 
     // Create a new internal URL and register it with the provided blob data.
     m_internalURL = BlobURL::createInternalURL();
     ThreadableBlobRegistry::registerBlobURL(m_internalURL, blobData);
 }
 
 Blob::Blob(const KURL& srcURL, const String& type, long long size)
     : m_type(type)
     , m_size(size)
 {
+    ScriptWrappable::init(this);
+
     // Create a new internal URL and register it with the same blob data as the source URL.
     m_internalURL = BlobURL::createInternalURL();
     ThreadableBlobRegistry::registerBlobURL(0, m_internalURL, srcURL);
 }
 
 Blob::~Blob()
 {
     ThreadableBlobRegistry::unregisterBlobURL(m_internalURL);
 }
 
@@ skipping 38 matching lines @@
             blobData->appendURL(toFile(this)->fileSystemURL(), start, length, modificationTime);
         else
             blobData->appendFile(toFile(this)->path(), start, length, modificationTime);
     } else
         blobData->appendBlob(m_internalURL, start, length);
 
     return Blob::create(blobData.release(), length);
 }
 
 } // namespace WebCore