MD Settings: Fix Learn More link on Google Hotword in ChromeOS

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/md_select_css.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-icon-button/paper-icon-button-light.html">
 <link rel="import" href="/controls/extension_controlled_indicator.html">
 <link rel="import" href="/controls/settings_toggle_button.html">
 <link rel="import" href="/icons.html">
 <link rel="import" href="/i18n_setup.html">
@@ skipping 66 matching lines @@
         <template is="dom-if" if="[[hotwordInfo_.allowed]]">
           <!-- Hotword (OK Google) -->
           <div class="settings-box two-line continuation">
             <settings-toggle-button id="hotwordSearchEnable" class="start"
                 pref="{{hotwordSearchEnablePref_}}"
                 label="$i18n{searchOkGoogleLabel}"
                 sub-label="[[getHotwordSearchEnableSubLabel_(
                            hotwordInfo_.alwaysOn)]]"
                 on-change="onHotwordSearchEnableChange_">
               <a href="$i18nRaw{hotwordLearnMoreUrl}" target="_blank"
-                  on-tap="doNothing_">
+                  class="label-controls" on-tap="doNothing_">
                 $i18n{searchOkGoogleLearnMore}
               </a>
             </settings-toggle-button>
             <div class="secondary-action"
                 hidden$="[[!getShowHotwordSearchRetrain_(hotwordInfo_.*)]]">
               <paper-button on-tap="onRetrainTap_" class="secondary-button">
                 $i18n{searchOkGoogleRetrain}
               </paper-button>
             </div>
           </div>
@@ skipping 41 matching lines @@
         <settings-subpage
             associated-control="[[$$('#subpage-trigger')]]"
             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>