MD Settings: adjust focus-outline behaviors on search engine iron-list.

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

 <link rel="import" href="chrome://resources/cr_elements/cr_action_menu/cr_action_menu.html">
 <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/html/icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="../controls/extension_controlled_indicator.html">
 <link rel="import" href="search_engine_dialog.html">
 <link rel="import" href="search_engine_entry_css.html">
 <link rel="import" href="search_engines_browser_proxy.html">
 <link rel="import" href="../settings_shared_css.html">
@@ skipping 20 matching lines @@
       }
 
       #url-column {
         flex: 4;
       }
 
       :host(:not([show-dots_])) paper-icon-button {
         pointer-events: none;
         visibility: hidden;
       }
+
+      :host(.no-outline) {
+        outline: none;
+      };
     </style>
 
     <template is="dom-if" if="[[showEditSearchEngineDialog_]]" restamp>
       <settings-search-engine-dialog model="[[engine]]">
       </settings-search-engine-dialog>
     </template>
     <div class="list-item">
       <div id="name-column">
         <div class="favicon-image"
             style="background-image: [[getIconSet_(engine.iconURL)]]"></div>
@@ skipping 20 matching lines @@
     <template is="dom-if" if="[[engine.extension]]">
       <extension-controlled-indicator
           extension-id="[[engine.extension.id]]"
           extension-name="[[engine.extension.name]]"
           extension-can-be-disabled="[[engine.extension.canBeDisabled]]">
       </extension-controlled-indicator>
     </template>
   </template>
   <script src="search_engine_entry.js"></script>
 </dom-module>