MD Settings: Search engines, use favicon cache.

chrome/browser/resources/settings/search_engines_page/omnibox_extension_entry.html

 <link rel="import" href="chrome://resources/html/polymer.html">
+<link rel="import" href="chrome://resources/html/util.html">
 <link rel="import" href="chrome://md-settings/search_engines_page/search_engines_browser_proxy.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-dropdown/iron-dropdown.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/iron-icons/iron-icons.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-item/paper-item.html">
 <link rel="import" href="chrome://md-settings/settings_shared_css.html">
 
 <dom-module id="settings-omnibox-extension-entry">
   <link rel="import" type="css" href="chrome://md-settings/search_engines_page/search_engine_entry.css">
   <template>
-    <style include="settings-shared"></style>
-    <style>
+    <style include="settings-shared">
       .name-column {
         flex: 3;
       }
 
       .keyword-column {
         flex: 7;
       }
     </style>
     <div id="container" class="list-item">
       <div class="name-column">
-        <span class="icon-container">
-          <template is="dom-if" if="[[engine.iconURL]]">
-            <iron-icon src="[[engine.iconURL]]"></iron-icon>
-          </template>
-          <template is="dom-if" if="[[!engine.iconURL]]">
-            <iron-icon icon="icons:find-in-page"></iron-icon>
-          </template>
-        </span>
+        <span class="favicon-image"
+            style="background-image: [[getIconSet_(engine.iconURL)]]"></span>
         <span class="name">[[engine.displayName]]</span>
       </div>
       <div class="keyword-column">[[engine.keyword]]</div>
         <paper-icon-button icon="more-vert" toggles active="{{editMenuOpened}}">
         </paper-icon-button>
         <iron-dropdown opened="{{editMenuOpened}}" horizontal-align="right"
             vertical-align="top">
           <div class="dropdown-content">
             <paper-item on-tap="onManageTap_" id="manage"
                 i18n-content="searchEnginesManageExtension"></paper-item>
             <paper-item on-tap="onDisableTap_"  id="disable"
                 i18n-content="disable"></paper-item>
           <div>
         </iron-dropdown>
     </div>
   </template>
   <script src="omnibox_extension_entry.js"></script>
 </dom-module>