function JstProcessor() {
  if (MAPS_DEBUG) {
    /**
     * An array of logging messages.  These are collected during processing
     * and dumped to the console at the end.
     * @type Array<string>
     */
    this.logs_ = [];
  }
}
Internal class used by jstemplates to maintain context.  This is
necessary to process deep templates in Safari which has a
relatively shallow maximum recursion depth of 100.
@class
@constructor