function innerCallback(entries)
        {
            for (var i = 0; i < entries.length; ++i) {
                var entry = entries[i];
                if (!entry.isDirectory) {
                    if (this._isFileExcluded(entry.fullPath))
                        continue;
                    fileCallback(entry.fullPath.substr(1));
                } else {
                    if (this._isFileExcluded(entry.fullPath + "/"))
                        continue;
                    ++pendingRequests;
                    this._requestEntries(entry.fullPath, innerCallback.bind(this));
                }
            }
            if (finishedCallback && (--pendingRequests === 0))
                finishedCallback();
        }
@param {!Array.<!FileEntry>} entries
@this {WebInspector.IsolatedFileSystem}