installScripts = function() {
          // Install scripts.
          // Suspend main queue to allow JS execution to occur sequentially.
          // TODO(nicksay): Consider using a sub-queue for JS execution.
          spf.tasks.suspend(key);
          spf.nav.response.installScripts_(extracted, function() {
            // Resume main queue after JS.
            spf.tasks.resume(key, sync);
            spf.debug.debug('  process task done: body', id);
          });
        }
Processes a SPF response.

@param {string} url The URL of the response being processed.
@param {spf.SingleResponse} response The SPF response object to process.
@param {spf.nav.Info=} opt_info The navigation info object.
@param {function(string, spf.SingleResponse)=} opt_callback Function to
    execute when processing is done; the first argument is `url`,
    the second argument is `response`.