MD Bookmarks: Focus sidebar nodes on click without showing an outline

chrome/browser/resources/md_bookmarks/item.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="chrome://bookmarks/actions.html">
+<link rel="import" href="chrome://bookmarks/mouse_focus_behavior.html">
 <link rel="import" href="chrome://bookmarks/shared_style.html">
 <link rel="import" href="chrome://bookmarks/store_client.html">
 
 <dom-module id="bookmarks-item">
   <template>
     <style include="shared-style">
       :host {
         display: block;
         flex-direction: row;
         position: relative;
       }
 
       #url {
         -webkit-padding-start: 20px;
         -webkit-user-select: none;
         align-items: center;
         color: inherit;
         display: flex;
         height: 40px;
         text-decoration: none;
       }
 
-      :host([mouse-focus_]) {
-        outline: none;
-      }
-
       :host([is-selected-item_]) {
         background-color: var(--highlight-color);
       }
 
       #website-title {
         flex: 1;
         overflow: hidden;
         text-decoration: none;
         text-overflow: ellipsis;
         white-space: nowrap;
@@ skipping 22 matching lines @@
       <div id="icon-wrapper">
         <iron-icon id="folder-icon" icon="cr:folder" hidden$="[[!isFolder_]]">
         </iron-icon>
         <div id="icon" hidden$="[[isFolder_]]"></div>
       </div>
       <div id="website-title">
         [[item_.title]]
       </div>
       <button is="paper-icon-button-light" class="more-vert-button"
           on-click="onMenuButtonClick_" on-dblclick="onMenuButtonDblClick_"
-          tabindex$="[[ironListTabIndex]]" on-focus="onItemBlur_">
+          tabindex$="[[ironListTabIndex]]" on-focus="clearMouseFocus">
         <div></div>
         <div></div>
         <div></div>
       </button>
     </div>
   </template>
   <script src="chrome://bookmarks/item.js"></script>
 <dom-module>