[MD settings] update i18n replacements in a11y, privacy, reset, and search

chrome/browser/resources/settings/search_page/search_page.html

 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/polymer.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">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-dropdown-menu/paper-dropdown-menu.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-listbox/paper-listbox.html">
 <link rel="import" href="chrome://md-settings/search_engines_page/search_engines_page.html">
 <link rel="import" href="chrome://md-settings/search_engines_page/search_engines_browser_proxy.html">
 <link rel="import" href="chrome://md-settings/settings_page/settings_animated_pages.html">
 <link rel="import" href="chrome://md-settings/settings_page/settings_subpage.html">
@@ skipping 26 matching lines @@
       }
 
       paper-listbox div:hover {
         background-color: var(--settings-hover-color);
       }
     </style>
     <settings-animated-pages id="pages" current-route="{{currentRoute}}"
         section="search">
       <neon-animatable id="main">
         <div class="settings-box first">
-          <p class="start" i18n-content="searchExplanation"></p>
+          <p class="start">$i18n{searchExplanation}</p>
           <paper-dropdown-menu>
             <paper-listbox class="dropdown-content"
                 selected="[[getSelectedSearchEngineIndex_(searchEngines_)]]"
                 on-iron-select="onIronSelect_">
               <template is="dom-repeat" items="[[searchEngines_]]">
                 <div>[[item.name]]</div>
               </template>
             </paper-listbox>
           </paper-dropdown-menu>
         </div>
         <div class="settings-box">
-          <paper-button i18n-content="searchEnginesManage"
-              on-tap="onManageSearchEnginesTap_" class="primary-button">
+          <paper-button on-tap="onManageSearchEnginesTap_"
+              class="primary-button">
+            $i18n{searchEnginesManage}
           </paper-button>
         </div>
       </neon-animatable>
       <template is="dom-if" name="search-engines">
         <settings-subpage page-title="[[i18n('searchEnginesManage')]]">
           <settings-search-engines-page></settings-search-engines-page>
         </settings-subpage>
       </template>
     </settings-animated-pages>
   </template>
   <script src="search_page.js"></script>
 </dom-module>