MD Settings: Certificate manager, respect USE_NSS_CERTS.

chrome/browser/resources/settings/privacy_page/privacy_page.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
+<if expr="use_nss_certs">
 <link rel="import" href="chrome://md-settings/certificate_manager_page/certificate_manager_page.html">
+</if>
 <link rel="import" href="chrome://md-settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html">
 <link rel="import" href="chrome://md-settings/controls/settings_checkbox.html">
 <link rel="import" href="chrome://md-settings/settings_page/settings_animated_pages.html">
 <link rel="import" href="chrome://md-settings/settings_page/settings_subheader.html">
 <link rel="import" href="chrome://md-settings/settings_shared_css.html">
 <link rel="import" href="chrome://md-settings/site_settings/all_sites.html">
 <link rel="import" href="chrome://md-settings/site_settings/constants.html">
 <link rel="import" href="chrome://md-settings/site_settings_page/site_settings_page.html">
 
 <dom-module id="settings-privacy-page">
@@ skipping 72 matching lines @@
               Contrary to popular belief, Lorem Ipsum is not simply random text.
             </div>
           </div>
         </div>
         <div class="settings-box">
           <paper-button on-tap="onClearBrowsingDataTap_" class="primary-button"
               i18n-content="clearBrowsingData">
           </paper-button>
         </div>
       </neon-animatable>
+<if expr="use_nss_certs">
       <neon-animatable id="manage-certificates">
         <settings-subheader i18n-values="page-title:manageCertificates">
         </settings-subheader>
         <settings-certificate-manager-page>
         </settings-certificate-manager-page>
       </neon-animatable>
+</if>
       <neon-animatable id="site-settings">
         <settings-subheader i18n-values="page-title:siteSettings">
         </settings-subheader>
         <settings-site-settings-page current-route="{{currentRoute}}"
             prefs="{{prefs}}" category-selected="{{categorySelected}}">
         </settings-site-settings-page>
       </neon-animatable>
 
       <neon-animatable id="all-sites">
         <settings-subheader
@@ skipping 96 matching lines @@
       <neon-animatable id="site-details">
         <site-details prefs="{{prefs}}" origin="{{originSelected}}"
             current-route="{{currentRoute}}"
             category-selected="{{categorySelected}}">
         </site-details>
       </neon-animatable>
     </settings-animated-pages>
   </template>
   <script src="privacy_page.js"></script>
 </dom-module>