Function prebuild

build-system/tasks/dist.js:231–235

* @return {Promise }

()

 * @return {Promise<void>}
 */
async function prebuild() {
  await preBuildExperiments();
  await preBuildLoginDone();
  await preBuildWebPushPublisherFiles();
}

/**
 * Copies parsers from the build folder to the dist folder