MD Settings: clean up text controls (links, buttons)

chrome/browser/resources/settings/on_startup_page/startup_urls_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/iron-list/iron-list.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_scrollable_behavior.html">
 <link rel="import" href="/controls/extension_controlled_indicator.html">
 <link rel="import" href="/settings_shared_css.html">
 <link rel="import" href="/on_startup_page/startup_url_dialog.html">
 <link rel="import" href="/on_startup_page/startup_url_entry.html">
 <link rel="import" href="/on_startup_page/startup_urls_page_browser_proxy.html">
@@ skipping 21 matching lines @@
           <template>
             <settings-startup-url-entry model="[[item]]"
                 tabindex$="[[tabIndex]]"
                 editable="[[!prefs.session.startup_urls.controlledBy]]">
             </settings-startup-url-entry>
           </template>
         </iron-list>
       </div>
       <template is="dom-if" if="[[!prefs.session.startup_urls.controlledBy]]"
           restamp>
-        <div class="list-item list-button" id="addPage" on-tap="onAddPageTap_">
-          $i18n{onStartupAddNewPage}
+        <div class="list-item" id="addPage">
+          <a is="action-link" class="list-button" on-tap="onAddPageTap_">
+            $i18n{onStartupAddNewPage}
+          </a>
         </div>
-        <div class="list-item list-button" id="useCurrentPages"
-            on-tap="onUseCurrentPagesTap_">$i18n{onStartupUseCurrent}</div>
+        <div class="list-item" id="useCurrentPages">
+          <a is="action-link" class="list-button"
+              on-tap="onUseCurrentPagesTap_">
+            $i18n{onStartupUseCurrent}
+          </a>
+        </div>
       </template>
       <template is="dom-if" if="[[prefs.session.startup_urls.extensionId]]"
           restamp>
         <extension-controlled-indicator
             extension-id="[[prefs.session.startup_urls.extensionId]]"
             extension-name="[[prefs.session.startup_urls.controlledByName]]"
             extension-can-be-disabled="[[
                 prefs.session.startup_urls.extensionCanBeDisabled]]">
         </extension-controlled-indicator>
       </template>
     </div>
     <template is="dom-if" if="[[showStartupUrlDialog_]]" restamp>
       <settings-startup-url-dialog model="[[startupUrlDialogModel_]]"
           on-close="destroyUrlDialog_">
       </settings-startup-url-dialog>
     </template>
   </template>
   <script src="startup_urls_page.js"></script>
 </dom-module>