[MD settings] remove count of content items in content settings

chrome/browser/resources/settings/site_settings/site_list.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/web_ui_listener_behavior.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/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-menu/paper-submenu.html">
 <link rel="import" href="/i18n_setup.html">
 <link rel="import" href="/icons.html">
 <link rel="import" href="/route.html">
@@ skipping 11 matching lines @@
         right: 8px;
       }
 
       .selectable {
         -webkit-user-select: text;
       }
     </style>
     <paper-submenu id="category" hidden
         on-paper-submenu-open="onToggle_" on-paper-submenu-close="onToggle_">
       <div class="menu-trigger settings-box" hidden$="[[allSites]]" actionable>
-        <div class="flex" id="header">
-          [[computeSiteListHeader_(sites, categoryEnabled)]]
-        </div>
+        <div class="flex" id="header">[[categoryHeader]]</div>
         <iron-icon id="icon" icon="cr:expand-more"></iron-icon>
       </div>
 
       <div class="list-frame menu-content vertical-list" id="listContainer">
         <template is="dom-repeat" items="[[sites]]">
           <div class="list-item">
             <div class="start layout horizontal center" on-tap="onOriginTap_"
                 actionable$="[[enableSiteSettings_]]">
               <div class="favicon-image"
                   style$="[[computeSiteIcon(item.originForDisplay)]]">
@@ skipping 44 matching lines @@
         <template is="dom-if" if="[[!allSites]]">
           <div class="list-item list-button" on-tap="onAddSiteTap_">
             $i18n{addSiteLink}
           </div>
         </template>
       </div>
     </paper-submenu>
   </template>
   <script src="site_list.js"></script>
 </dom-module>