[WebUI] Fix all CSS nits in chrome/browser/resources/chromeos.

chrome/browser/resources/chromeos/choose_mobile_network.css

+/* Copyright (c) 2012 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
 .scanning-msg {
   margin-left: 50px;
 }
 
 .spinner {
-  width: 32px;
-  height: 32px;
-  float: left;
-
+  -webkit-animation-duration: 2s;
+  -webkit-animation-iteration-count: infinite;
+  -webkit-animation-name: spin;
+  -webkit-animation-timing-function: linear;
+  background-image: -webkit-canvas(spinner-circle);
   background-position: 50% 50%;
   background-repeat: no-repeat;
-
-  background-image: -webkit-canvas(spinner-circle);
-
-  -webkit-animation-name: spin;
-  -webkit-animation-duration: 2s;
-  -webkit-animation-iteration-count: infinite;
-  -webkit-animation-timing-function: linear;
+  float: left;
+  height: 32px;
+  width: 32px;
 }
 
 .content-area {
   height: 120px;
   overflow: auto;
 }
 
 .disabled {
   opacity: 0.7;
 }
 
 @-webkit-keyframes spin {
   from {
-    -webkit-transform: rotate(0deg);
+    -webkit-transform: rotate(0);
   }
   to {
     -webkit-transform: rotate(360deg);
   }
 }