MD Settings: Manage search engines, localizing/adding strings.

chrome/browser/resources/settings/search_engines_page/search_engine_dialog.html

 <link rel="import" href="chrome://resources/html/polymer_config.html">
 <link rel="import" href="chrome://md-settings/i18n_setup.html">
 <link rel="import" href="chrome://md-settings/search_engines_page/search_engines_browser_proxy.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-dialog/paper-dialog.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-input/paper-input.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 
 <dom-module id="settings-search-engine-dialog">
   <link rel="import" type="css" href="chrome://md-settings/settings_dialog.css">
   <template>
     <paper-dialog modal id="dialog">
       <div id="dialog-content">
         <div class="top-row">
           <span class="title">[[dialogTitle_]]</span>
           <paper-icon-button icon="clear" on-tap="cancel_" id="close">
           </paper-icon-button>
         </div>
         <div class="body">
           <div class="explanation">
             <paper-input always-float-label id="searchEngine"
-                i18n-values="label:searchEnginesSearchEngineLabel"
+                i18n-values="label:searchEnginesSearchEngine;error-message:searchEnginesNotValid"
                 value="{{searchEngine_}}" on-focus="validate_"
                 on-input="validate_">
             </paper-input>
             <paper-input always-float-label id="keyword"
-                i18n-values="label:searchEnginesKeywordLabel"
+                i18n-values="label:searchEnginesKeyword;error-message:searchEnginesNotValid"
                 value="{{keyword_}}" on-focus="validate_" on-input="validate_">
             </paper-input>
             <paper-input always-float-label id="queryUrl"
-                i18n-values="label:searchEnginesQueryURLLabel"
+                i18n-values="label:searchEnginesQueryURLExplanation;error-message:searchEnginesNotValid"
                 value="{{queryUrl_}}" on-focus="validate_" on-input="validate_">
             </paper-input>
           </div>
           <div class="button-container">
             <paper-button class="cancel-button" on-tap="cancel_"
                 i18n-content="cancel" id="cancel"></paper-button>
             <paper-button id="actionButton" class="action-button"
                 on-tap="onActionButtonTap_">
               [[actionButtonText_]]
             </paper-button>
           </div>
         </div>
       </div>
     </paper-dialog>
   </template>
   <script src="search_engine_dialog.js"></script>
 </dom-module>