Manage WebSQL callbacks with OwnPtr instead of refcounting

Source/modules/webdatabase/SQLTransactionSync.h

Index: Source/modules/webdatabase/SQLTransactionSync.h
diff --git a/Source/modules/webdatabase/SQLTransactionSync.h b/Source/modules/webdatabase/SQLTransactionSync.h
index e645341dadfde670b886a8d6184a1bfd1656b839..62aa5d57060ab00c07c2419ba5d8e7709c067f1e 100644
--- a/Source/modules/webdatabase/SQLTransactionSync.h
+++ b/Source/modules/webdatabase/SQLTransactionSync.h
@@ -40,12 +40,12 @@ namespace WebCore {
 // Instances of this class should be created and used only on the worker's context thread.
 class SQLTransactionSync : public SQLTransactionBackendSync, public ScriptWrappable {
 public:
-    static PassRefPtr<SQLTransactionSync> create(DatabaseSync*, PassRefPtr<SQLTransactionSyncCallback>, bool readOnly = false);
+    static PassRefPtr<SQLTransactionSync> create(DatabaseSync*, PassOwnPtr<SQLTransactionSyncCallback>, bool readOnly = false);
 
     static SQLTransactionSync* from(SQLTransactionBackendSync*);
 
 private:
-    SQLTransactionSync(DatabaseSync*, PassRefPtr<SQLTransactionSyncCallback>, bool readOnly);
+    SQLTransactionSync(DatabaseSync*, PassOwnPtr<SQLTransactionSyncCallback>, bool readOnly);
 };
 
 } // namespace WebCore