Add support for custom entries in <cr_network_select/>.

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

Index: ui/webui/resources/cr_elements/network/cr_network_list_item.html
diff --git a/ui/webui/resources/cr_elements/network/cr_network_list_item.html b/ui/webui/resources/cr_elements/network/cr_network_list_item.html
index 23fca1359d95e54dc59f6b526036d9360484e201..c06ec046b1ab22d4f887af2a447acab3923d9222 100644
--- a/ui/webui/resources/cr_elements/network/cr_network_list_item.html
+++ b/ui/webui/resources/cr_elements/network/cr_network_list_item.html
@@ -1,6 +1,7 @@
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/iron-icons/icons.html">

[stevenjb, 2016/06/16 17:41:34]

This is going to be disallowed soon. It takes a very long time to load. Instead
we need to create a custom subset with the supported iconset copied into it. See
chrome/browser/resources/settings/icons.html for an example.

(But also see my next comment)

[Alexander Alekseev, 2016/06/22 08:24:18]

Done.

 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_network_icon.html">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_onc_types.html">
@@ -91,8 +92,13 @@
     <div id="divOuter" is-list-item$="[[isListItem_(listItemType)]]">
       <div id="divIcon">
         <cr-network-icon id="icon" is-list-item="[[isListItem_(listItemType)]]"
-            network-state="[[networkState]]">
+            network-state="[[networkState]]"
+            hidden$="[[networkState.overridePolymerIcon]]">
         </cr-network-icon>
+        <iron-icon id="substituteIcon"
+            icon="[[networkState.overridePolymerIcon]]"
+            hidden$="[[!networkState.overridePolymerIcon]]">
+        </iron-icon>
       </div>
       <div id="divText" class="layout horizontal flex">
         <span id="networkName"></span>
@@ -100,12 +106,12 @@
         </span>
       </div>
       <div class="buttons"
-          hidden$="[[!isListItemType_(listItemType, 'visible')]]">
+          hidden$="[[settingsButtonHidden]]">
         <paper-icon-button icon="cr:settings" on-tap="fireShowDetails_">
         </paper-icon-button>
       </div>
       <div class="known buttons"
-          hidden$="[[!isListItemType_(listItemType, 'known')]]">
+          hidden$="[[knownButtonsHidden]]">
         <paper-icon-button icon="[[sharedIcon_(networkState)]]" disabled>
         </paper-icon-button>
         <paper-icon-button icon="[[preferredIcon_(networkState)]]"