function fileWriterCreated(fileWriter)
        {
            fileWriter.onerror = errorHandler.bind(this);
            fileWriter.onwriteend = fileWritten;
            var blob = new Blob([content], { type: "text/plain" });
            fileWriter.write(blob);

            function fileWritten()
            {
                fileWriter.onwriteend = callback;
                fileWriter.truncate(blob.size);
            }
        }
@param {!FileWriter} fileWriter
@this {WebInspector.IsolatedFileSystem}