Use md-select instead of paper-dropdown-menu-light in display.html

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-light.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">
+<link rel="import" href="/md_select_css.html">
 <link rel="import" href="/settings_shared_css.html">
 
 <dom-module id="settings-display">
   <template>
-    <style include="settings-shared">
+    <style include="settings-shared md-select">
      .settings-box.embedded {
        align-self: stretch;
        margin-left: 20px;
        padding: 0;
      }
 
      display-layout {
        align-self: stretch;
        flex: 1 1;
        height: 300px;
@@ skipping 43 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-light 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-light>
+        <div class="md-select-wrapper">
+          <select id="orientation" class="md-select"
+              on-change="onSetOrientation_">

[dpapad, 2016/10/18 00:14:46]

Nit(optional): Consider renaming this to onOrientationChange_ for consistency
with other listener names.

[stevenjb, 2016/10/18 00:43:10]

Done.

+            <option value="0">$i18n{displayOrientationStandard}</option>
+            <option value="90">90</option>
+            <option value="180">180</option>
+            <option value="270">270</option>
+          </select>
+          <span class="md-select-underline"></span>
+        </div>
       </div>
       <div class="settings-box embedded"
           hidden$="[[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>