MD Settings: Simplify settings-dropdown-menu

chrome/browser/resources/settings/appearance_page/appearance_page.html

 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/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-icon/iron-icon.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-radio-button/paper-radio-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-toggle-button/paper-toggle-button.html">
 <link rel="import" href="chrome://md-settings/controls/settings_input.html">
 <link rel="import" href="chrome://md-settings/controls/settings_radio_group.html">
 <link rel="import" href="chrome://md-settings/settings_page/settings_animated_pages.html">
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           </div>
         </template>
         <div class="settings-box split">
           <div class="start" i18n-content="showBookmarksBar"></div>
           <paper-toggle-button
               checked="{{prefs.bookmark_bar.show_on_all_tabs.value}}">
           </paper-toggle-button>
         </div>
         <div class="settings-box split">
           <div class="start" i18n-content="fontSize"></div>
-          <settings-dropdown-menu id="defaultFontSize" disabled
+          <settings-dropdown-menu id="defaultFontSize"
               pref="{{prefs.webkit.webprefs.default_font_size}}"
-              menuOptions="[[fontSizeOptions_]]">
+              menu-options="[[fontSizeOptions_]]">
           </settings-dropdown-menu>
         </div>
         <div class="settings-box split">
           <div class="start" i18n-content="customizeFonts"></div>
           <paper-button on-tap="onCustomizeFontsTap_"
               i18n-content="customizeFonts"></paper-button>
         </div>
         <div class="settings-box split">
           <div class="start" i18n-content="pageZoom"></div>
-          <settings-dropdown-menu id="pageZoom" disabled
+          <settings-dropdown-menu id="pageZoom"
               pref="{{prefs.partition.default_zoom_level}}"
-              menuOptions="[[pageZoomOptions_]]">
+              menu-options="[[pageZoomOptions_]]">
           </settings-dropdown-menu>
         </div>
       </neon-animatable>
       <neon-animatable id="appearance-fonts">
         <settings-subheader i18n-values="page-title:customizeFonts">
         </settings-subheader>
         <settings-appearance-fonts-page prefs="{{prefs}}">
         </settings-appearance-fonts-page>
       </neon-animatable>
     </settings-animated-pages>
   </template>
   <script src="appearance_page.js"></script>
 </dom-module>