Manage WebSQL callbacks with OwnPtr instead of refcounting

Source/modules/webdatabase/Database.h

 /*
  * Copyright (C) 2007, 2008, 2013 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 36 matching lines @@
 class SQLTransactionCallback;
 class SQLTransactionErrorCallback;
 class SQLVoidCallback;
 
 class Database : public DatabaseBase, public DatabaseBackend, public ScriptWrappable {
 public:
     virtual ~Database();
 
     // Direct support for the DOM API
     virtual String version() const;
-    void changeVersion(const String& oldVersion, const String& newVersion, PassRefPtr<SQLTransactionCallback>, PassRefPtr<SQLTransactionErrorCallback>, PassRefPtr<SQLVoidCallback> successCallback);
-    void transaction(PassRefPtr<SQLTransactionCallback>, PassRefPtr<SQLTransactionErrorCallback>, PassRefPtr<SQLVoidCallback> successCallback);
-    void readTransaction(PassRefPtr<SQLTransactionCallback>, PassRefPtr<SQLTransactionErrorCallback>, PassRefPtr<SQLVoidCallback> successCallback);
+    void changeVersion(const String& oldVersion, const String& newVersion, PassOwnPtr<SQLTransactionCallback>, PassOwnPtr<SQLTransactionErrorCallback>, PassOwnPtr<SQLVoidCallback> successCallback);
+    void transaction(PassOwnPtr<SQLTransactionCallback>, PassOwnPtr<SQLTransactionErrorCallback>, PassOwnPtr<SQLVoidCallback> successCallback);
+    void readTransaction(PassOwnPtr<SQLTransactionCallback>, PassOwnPtr<SQLTransactionErrorCallback>, PassOwnPtr<SQLVoidCallback> successCallback);
 
     // Internal engine support
     static Database* from(DatabaseBackend*);
     DatabaseContext* databaseContext() const { return m_databaseContext.get(); }
 
     Vector<String> tableNames();
 
     virtual SecurityOrigin* securityOrigin() const;
 
     virtual void closeImmediately();
 
     void scheduleTransactionCallback(SQLTransaction*);
 
 private:
     Database(PassRefPtr<DatabaseContext>, const String& name,
         const String& expectedVersion, const String& displayName, unsigned long estimatedSize);
     PassRefPtr<DatabaseBackend> backend();
     static PassRefPtr<Database> create(ExecutionContext*, PassRefPtr<DatabaseBackendBase>);
 
-    void runTransaction(PassRefPtr<SQLTransactionCallback>, PassRefPtr<SQLTransactionErrorCallback>,
-        PassRefPtr<SQLVoidCallback> successCallback, bool readOnly, const ChangeVersionData* = 0);
+    void runTransaction(PassOwnPtr<SQLTransactionCallback>, PassOwnPtr<SQLTransactionErrorCallback>,
+        PassOwnPtr<SQLVoidCallback> successCallback, bool readOnly, const ChangeVersionData* = 0);
 
     Vector<String> performGetTableNames();
 
     void reportStartTransactionResult(int errorSite, int webSqlErrorCode, int sqliteErrorCode);
     void reportCommitTransactionResult(int errorSite, int webSqlErrorCode, int sqliteErrorCode);
 
     RefPtr<SecurityOrigin> m_databaseThreadSecurityOrigin;
     RefPtr<DatabaseContext> m_databaseContext;
 
     friend class DatabaseManager;
     friend class DatabaseServer; // FIXME: remove this when the backend has been split out.
     friend class DatabaseBackend; // FIXME: remove this when the backend has been split out.
     friend class SQLStatement;
     friend class SQLTransaction;
 };
 
 } // namespace WebCore
 
 #endif // Database_h