MD Settings: add empty list message for spell-check edit page.

chrome/test/data/webui/settings/languages_page_browsertest.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.
 
 /** @fileoverview Suite of tests for settings-languages-page. */
 
 /** @const {string} Path to root from chrome/test/data/webui/settings/. */
 var ROOT_PATH = '../../../../../';
 
 // Polymer BrowserTest fixture.
@@ skipping 431 matching lines @@
             0, triggerRow.querySelector('.secondary').textContent.length);
 
         languagesPage.set(
             'languages.enabled.0.language.supportsSpellcheck', true);
         languagesPage.set('languages.enabled.0.spellCheckEnabled', true);
         assertTrue(triggerRow.classList.contains('two-line'));
         assertLT(
             0, triggerRow.querySelector('.secondary').textContent.length);
       }
     });
-
-    if (!cr.isMac) {
-      test('spellcheck edit dictionary page add word validation', function() {
-        assertFalse(!!languagesPage.$$('settings-edit-dictionary-page'));
-        var spellCheckCollapse = languagesPage.$.spellCheckCollapse;
-        MockInteractions.tap(
-            spellCheckCollapse.querySelector('.list-button'));
-        var editDictPage = languagesPage.$$('settings-edit-dictionary-page');
-        assertTrue(!!editDictPage);
-        var addWordButton = editDictPage.root.querySelector('paper-button');
-        editDictPage.$.newWord.value = '';
-        assertTrue(!!addWordButton);
-        assertTrue(addWordButton.disabled);
-        editDictPage.$.newWord.value = 'valid word';
-        assertFalse(addWordButton.disabled);
-      });
-    }
   }.bind(this));
 
   // TODO(michaelpg): Test more aspects of the languages UI.
 
   // Run all registered tests.
   mocha.run();
 });