ui/webui/resources/cr_elements/network/cr_network_icon.html

<link rel="import" href="chrome://resources/html/polymer.html">
<link rel="import" href="chrome://resources/cr_elements/network/cr_onc_types.html">

<dom-module id="cr-network-icon">
  <template>
    <style>
      /* Note: we use display: block here to avoid positioning issues related to
         the use of overflow: hidden. */
      :host {
        display: block;
        height: 50px;
        overflow: hidden;
        position: relative;
        width: 50px;
      }

      #icon {
        height: 100%;
        position: absolute;
        width: 100%;
      }

      #icon.multi-level {
        height: 500%;
      }

      #icon.level0 {
        top: 0px;
      }

      #icon.level1 {
        top: -100%;
      }

      #icon.level2 {
        top: -200%;
      }

      #icon.level3 {
        top: -300%;
      }

      #icon.level4 {
        top: -400%;
      }

      /* Connecting animation */

      #icon.connecting {
        -webkit-animation: levels 1s infinite;
        -webkit-animation-timing-function: steps(4, start);
      }

      @-webkit-keyframes levels {
        from {
          top: 0%;
        }
        to {
          top: -400%;
        }
      }

      /* Badges. */
      /* Note: These use left/right because we do not reverse the badges for
       * RTL. */

      /* Upper-left corner */
      #technology {
        height: 40%;
        left: 0px;
        position: absolute;
        top: 0px;
      }

      /* Lower-right corner */
      #roaming,
      #secure {
        height: 40%;
        left: 60%;
        position: absolute;
        top: 60%;
        width: 40%;
      }
    </style>
    <img id="icon" src$="[[toImageSrc_(iconType_)]]" alt="">
    <img id="technology" alt="" src$="[[toBadgeImageSrc_(technology_)]]"
        hidden$="[[!technology_]]">
    <img id="roaming" alt=""
        src="chrome://resources/cr_elements/network/badge_roaming.png"
        hidden$="[[!roaming_]]">
    <img id="secure" alt=""
        src="chrome://resources/cr_elements/network/badge_secure.png"
        hidden$="[[!secure_]]">
  </template>
  <script src="cr_network_icon.js"></script>
</dom-module>