MD Settings: make custom UIs look "actionable"

chrome/browser/resources/settings/people_page/sync_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/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-pages/iron-pages.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-checkbox/paper-checkbox.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-input/paper-input.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-radio-button/paper-radio-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-radio-group/paper-radio-group.html">
@@ skipping 106 matching lines @@
               hidden="[[!syncPrefs.autofillRegistered]]"
               disabled="[[shouldPaymentsCheckboxBeDisabled_(
                   syncPrefs.syncAllDataTypes, syncPrefs.autofillSynced)]]">
             $i18n{enablePaymentsIntegrationCheckboxLabel}
             <a href="$i18nRaw{autofillHelpURL}" target="_blank">
               $i18n{learnMore}
             </a>
           </paper-checkbox>
         </div>
 
-        <div class="settings-box two-line" on-tap="onManageSyncedDataTap_">
+        <div class="settings-box two-line" on-tap="onManageSyncedDataTap_"
+            actionable>
           <div class="start">
             $i18n{manageSyncedDataTitle}
             <div class="secondary">
               $i18n{manageSyncedDataDescription}
             </div>
           </div>
         </div>
 
         <div class="settings-box two-line">
           <div class="start">
@@ skipping 61 matching lines @@
                 on-tap="onSubmitExistingPassphraseTap_" class="action-button">
               $i18n{submitPassphraseButton}
             </paper-button>
           </div>
         </template>
       </div>
     </iron-pages>
   </template>
   <script src="sync_page.js"></script>
 </dom-module>