Oilpan: Add support of pre-finalization callback to Oilpan infrastructure.

Source/modules/indexeddb/IDBCursor.cpp

Index: Source/modules/indexeddb/IDBCursor.cpp
diff --git a/Source/modules/indexeddb/IDBCursor.cpp b/Source/modules/indexeddb/IDBCursor.cpp
index 904508b0e6d0f183dbb06a279a10613ec4f7e2ac..39d3c46b6e7f57fb9939500b77b60ce0747a6712 100644
--- a/Source/modules/indexeddb/IDBCursor.cpp
+++ b/Source/modules/indexeddb/IDBCursor.cpp
@@ -333,7 +333,7 @@ void IDBCursor::setValueReady(IDBKey* key, IDBKey* primaryKey, PassRefPtr<Shared
         m_blobInfo = blobInfo;
         m_valueDirty = true;
         if (m_blobInfo && m_blobInfo->size() > 0)
-            V8PerIsolateData::from(m_request->scriptState()->isolate())->ensureIDBPendingTransactionMonitor()->registerCursor(*this);
+            ThreadState::current()->registerPreFinalizer(*this);
     }
 
     m_gotValue = true;
@@ -360,7 +360,7 @@ void IDBCursor::handleBlobAcks()
         ASSERT(m_request);
         m_transaction->db()->ackReceivedBlobs(m_blobInfo.get());
         m_blobInfo.clear();
-        V8PerIsolateData::from(m_request->scriptState()->isolate())->ensureIDBPendingTransactionMonitor()->unregisterCursor(*this);
+        ThreadState::current()->unregisterPreFinalizer(*this);
     }
 }