Site Settings Desktop: Only show Remove action if filter hasn't removed all.

chrome/browser/resources/settings/site_settings/site_data.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/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout-classes.html">
 <link rel="import" href="/settings_page/settings_subpage_search.html">
 <link rel="import" href="/settings_shared_css.html">
 <link rel="import" href="/site_settings/site_data_details_dialog.html">
 <link rel="import" href="/site_settings/site_settings_behavior.html">
 
 <dom-module id="site-data">
@@ skipping 18 matching lines @@
       .site {
         margin-top: 7px;
       }
 
       #filter {
         margin-top: -4px;
       }
     </style>
     <div class="layout horizontal">
       <div class="flex site-header">$i18n{siteSettingsCookieHeader}</div>
-      <div class="secondary-action" hidden$="[[!removeAllIsVisible_(sites)]]">
+      <div class="secondary-action"
+          hidden$="[[!isRemoveButtonVisible_(sites, renderedItemCount)]]">
         <paper-button on-tap="onDeleteMultipleSites_" class="secondary-button">
           [[computeRemoveLabel_(filterString_)]]
         </paper-button>
       </div>
       <settings-subpage-search id="filter" on-search-changed="onSearchChanged_"
           label="$i18n{siteSettingsCookieSearch}">
       </settings-subpage-search>
     </div>
 
     <div class="list-frame vertical-list">
-      <template is="dom-repeat" id="list" items="[[sites]]" filter="showItem_">
+      <template is="dom-repeat" id="list" items="[[sites]]" filter="showItem_"
+          rendered-item-count="{{renderedItemCount}}">
         <div class="list-item layout horizontal">
           <div class="layout horizontal flex" on-tap="onSiteTap_" actionable>
             <div class="favicon-image site"
                 style$="[[computeSiteIcon(item.site)]]">
             </div>
             <div class="flex middle">[[item.site]]</div>
             <div class="site">[[item.localData]]</div>
           </div>
           <paper-icon-button on-tap="onDeleteSite_"
               icon="cr:delete"></paper-icon-button>
         </div>
       </template>
     </div>
-
   </template>
   <script src="cookie_info.js"></script>
   <script src="cookie_tree_node.js"></script>
   <script src="site_data.js"></script>
 </dom-module>