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

chrome/test/data/webui/settings/device_page_tests.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('device_page_tests', function() {
   /** @enum {string} */
   var TestNames = {
     DevicePage: 'device page',
     Display: 'display',
     Keyboard: 'keyboard',
@@ skipping 458 matching lines @@
         // orientation of the second display.
         var displayLayout = displayPage.$$('#displayLayout');
         assertTrue(!!displayLayout);
         var displayDiv = displayLayout.$$('#_fakeDisplayId2');
         assertTrue(!!displayDiv);
         MockInteractions.tap(displayDiv);
         expectEquals(
             displayPage.displays[1].id, displayPage.selectedDisplay.id);
 
         displayPage.onMakePrimaryTap_();
-        displayPage.onSetOrientation_({detail: {selected: '90'}});
+        displayPage.onOrientationChange_({target: {value: '90'}});
         fakeSystemDisplay.onDisplayChanged.callListeners();
 
         return Promise.all([
           fakeSystemDisplay.getInfoCalled.promise,
           fakeSystemDisplay.getLayoutCalled.promise,
           new Promise(function(resolve, reject) { setTimeout(resolve); })
         ]);
       }).then(function() {
         // Confirm that the second display is selected, primary, and rotated.
         expectEquals(2, displayPage.displays.length);
@@ skipping 22 matching lines @@
         expectTrue(displayPage.showMirror_(displayPage.displays));
         expectTrue(displayPage.isMirrored_(displayPage.displays));
       });
     });
   });
 
   return {
     TestNames: TestNames
   };
 });