old_contents: module.exports = {
    // Autoprefixer
    autoprefixer: {
      // https://github.com/postcss/autoprefixer#browsers
      browsers: [
        'Explorer >= 10',
        'ExplorerMobile >= 10',
        'Firefox >= 30',
        'Chrome >= 34',
        'Safari >= 7',
        'Opera >= 23',
        'iOS >= 7',
        'Android >= 4.4',
        'BlackBerry >= 10'
      ]
    },
    // BrowserSync
    browserSync: {
      browser: 'default', // or ["google chrome", "firefox"]
      https: false, // Enable https for localhost development.
      notify: false, // The small pop-over notifications in the browser.
      port: 9000
    },
    // GitHub Pages
    ghPages: {
      branch: 'gh-pages',
      domain: 'polymer-starter-kit.startpolymer.org', // change it!
      origin: 'origin2' // default is 'origin'
    },
    // PageSpeed Insights
    // Please feel free to use the `nokey` option to try out PageSpeed
    // Insights as part of your build process. For more frequent use,
    // we recommend registering for your own API key. For more info:
    // https://developers.google.com/speed/docs/insights/v1/getting_started
    pageSpeed: {
      key: '', // need uncomment in task
      nokey: true,
      site: 'http://polymer-starter-kit.startpolymer.org', // change it!
      strategy: 'mobile' // or desktop
    }
  };
  
new_contents: module.exports = {
    // Autoprefixer
    autoprefixer: {
      // https://github.com/postcss/autoprefixer#browsers
      browsers: [
        'Explorer >= 10',
        'ExplorerMobile >= 10',
        'Firefox >= 30',
        'Chrome >= 34',
        'Safari >= 7',
        'Opera >= 23',
        'iOS >= 7',
        'Android >= 4.4',
        'BlackBerry >= 10'
      ]
    },
    // BrowserSync
    browserSync: {
      browser: 'default', // or ["google chrome", "firefox"]
      https: false, // Enable https for localhost development.
      notify: false, // The small pop-over notifications in the browser.
      port: 9000
    },
    // GitHub Pages
    ghPages: {
      branch: 'gh-pages',
      domain: 'polymer-starter-kit.startpolymer.org', // change it!
      origin: 'origin'
    },
    // PageSpeed Insights
    // Please feel free to use the `nokey` option to try out PageSpeed
    // Insights as part of your build process. For more frequent use,
    // we recommend registering for your own API key. For more info:
    // https://developers.google.com/speed/docs/insights/v1/getting_started
    pageSpeed: {
      key: '', // need uncomment in task
      nokey: true,
      site: 'http://polymer-starter-kit.startpolymer.org', // change it!
      strategy: 'mobile' // or desktop
    }
  };
  
subject: Revert remote origin to 'origin' for deploy github pages