Clean-up: Change chrome/browser's CSS time units from s to ms.

chrome/browser/resources/chromeos/choose_mobile_network.css

 .scanning-msg {
   margin-left: 50px;
 }
 
 .spinner {
   width: 32px;
   height: 32px;
   float: left;
 
   background-position: 50% 50%;
   background-repeat: no-repeat;
 
   background-image: -webkit-canvas(spinner-circle);
 
   -webkit-animation-name: spin;
-  -webkit-animation-duration: 2s;
+  -webkit-animation-duration: 2000ms;
   -webkit-animation-iteration-count: infinite;
   -webkit-animation-timing-function: linear;
 }
 
 .content-area {
   height: 120px;
   overflow: auto;
 }
 
 .disabled {
   opacity: 0.7;
 }
 
 @-webkit-keyframes spin {
   from {
     -webkit-transform: rotate(0deg);
   }
   to {
     -webkit-transform: rotate(360deg);
   }
 }