Manage WebSQL callbacks with OwnPtr instead of refcounting

Source/modules/webdatabase/Database.h

Index: Source/modules/webdatabase/Database.h
diff --git a/Source/modules/webdatabase/Database.h b/Source/modules/webdatabase/Database.h
index d17bb20d9b53a0102fe125dcc3bab31577f9d52d..0db19c3a8b7e4772fe1705ba1dc6063a75836aa5 100644
--- a/Source/modules/webdatabase/Database.h
+++ b/Source/modules/webdatabase/Database.h
@@ -54,9 +54,9 @@ public:
 
     // 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*);
@@ -76,8 +76,8 @@ private:
     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();