Add custom Polymer network icon element

chrome/browser/resources/chromeos/network_ui/network_ui.css

 /*
  * Copyright 2013 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.
  */
 
+paper-button[raised].colored {
+  background: rgb(66, 133, 244);
+  color: rgb(255, 255, 255);
+}
+
 #header {
   margin: 5px;
 }
 
 #header a {
   padding: 0 4px;
 }
 
+#header cr-network-icon {
+  height: 25px;
+  width: 25px;
+}
+
+#default-network {
+  align-items: center;
+  display: flex;
+  flex-direction: row;
+  padding: 4px;
+}
+
+#default-network-text {
+  font-size: 14px;
+  font-weight: bold;
+  padding-left: 8px;
+}
+
+#header #refresh {
+  margin: 4px;
+}
+
 .state-table {
   border-collapse: collapse;
 }
 
 .state-table tr td {
   border: 1px solid rgb(220, 220, 220);
   font-size: 13px;
 }
 
 .state-table-header {
@@ skipping 11 matching lines @@
   margin: 0;
   outline: none;
   padding: 0;
   width: 20px;
 }
 
 .state-table-expanded-cell {
   white-space: pre-wrap;
 }
 
+.state-table cr-network-icon {
+  height: 32px;
+  width: 32px;
+}
+
 #advanced-options {
   margin-top: 10px;
 }