MD Settings: Fix paper/iron dropdown alignment

chrome/browser/resources/settings/device_page/display.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/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.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-listbox/paper-listbox.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-slider/paper-slider.html">
 <link rel="import" href="/device_page/display_layout.html">
 <link rel="import" href="/device_page/display_overscan_dialog.html">
@@ skipping 65 matching lines @@
         <paper-slider snaps max-markers="100" step="1"
             disabled="[[!enableSetResolution_(selectedDisplay)]]"
             min="0" max="[[maxModeIndex_]]"
             value="[[selectedModeIndex_]]"
             immediate-value="{{immediateSelectedModeIndex_}}"
             on-change="onChangeMode_">
         </paper-slider>
       </div>
       <div class="settings-box embedded">
         <div class="start textarea">$i18n{displayOrientation}</div>
-        <paper-dropdown-menu no-label-float>
+        <paper-dropdown-menu vertical-align="auto" no-label-float>
           <paper-listbox class="dropdown-content"
               selected="[[selectedDisplay.rotation]]"
               attr-for-selected="value"
               on-iron-activate="onSetOrientation_">
             <button class="dropdown-item" role="option" value="0">
               $i18n{displayOrientationStandard}
             </button>
             <button class="dropdown-item" role="option" value="90">90</button>
             <button class="dropdown-item" role="option" value="180">180</button>
             <button class="dropdown-item" role="option" value="270">270</button>
           </paper-listbox>
         </paper-dropdown-menu>
       </div>
       <div class="settings-box embedded"
           hidden$="[[selectedDisplay.isInternal]]">
         <paper-button disabled="[[selectedDisplay.isInternal]]"
             on-tap="onOverscanTap_">
           $i18n{displayOverscanPageTitle}
         </paper-button>
       </div>
 
       <settings-display-overscan-dialog id="displayOverscan"
           display-id="{{overscanDisplayId}}">
       </settings-display-overscan-dialog>
 
     </div>
   </template>
   <script src="display.js"></script>
 </dom-module>