chromium/chrome/test/data/extensions/subscribe_page_action_v2/src/subscribe.css

body {
  display:-webkit-box;
  -webkit-box-orient:vertical;
}

body>* {
  display:-webkit-box;
}

#items {
  -webkit-box-flex:1;
  -webkit-box-orient:vertical;
  -webkit-box-align:stretch;
  height: -webkit-fill-available;
}

iframe {
  display:-webkit-box;
  -webkit-box-flex:1;
}

.splitter {
  padding: 2px 8px 2px 5px;
  border-top: solid 1px #9CC2EF;
  background: #EBEFF9;
  font-size: 13px;
  font-weight: bold;
  display: block;
}

.feedUrlSpan {
  float: right;
}

.feedUrl {
  font-size: 8pt;
}