MD Settings: change settings-input to home-url-input due to reduced usage.

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

 // Copyright 2015 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.
 
 /**
  * @constructor
  * @implements {settings.AppearanceBrowserProxy}
  * @extends {settings.TestBrowserProxy}
  */
 var TestAppearanceBrowserProxy = function() {
@@ skipping 234 matching lines @@
   test('show home button toggling', function() {
     assertFalse(!!appearancePage.$$('.list-frame'));
     appearancePage.set('prefs', {browser: {show_home_button: {value: true}}});
 
     Polymer.dom.flush();
 
     assertTrue(!!appearancePage.$$('.list-frame'));
   });
 
   test('home button urls', function() {
-    appearancePage.set('prefs', {
-      browser: {show_home_button: {value: true}},
-      homepage: {type: chrome.settingsPrivate.PrefType.URL, value: 'test'}
-    });
+    var input = document.createElement('home-url-input');
+    input.set(
+        'pref', {type: chrome.settingsPrivate.PrefType.URL, value: 'test'});
 
+    document.body.appendChild(input);

[dpapad, 2017/03/30 20:27:00]

This test no longer uses appearancePage. Let's call PolymerTest.clearBody()
before appending to body (test should still work).

Moreover (optional), you could also move this test to its own suite() in this
file.

[scottchen, 2017/03/31 00:01:06]

Done.

     Polymer.dom.flush();
 
-    var input = appearancePage.$$('#customHomePage');
-    assertTrue(!!input);
     assertFalse(input.invalid);
     assertEquals(input.value, 'test');
 
     input.value = '@@@';
     appearanceBrowserProxy.setValidStartupPageResponse(false);
-    input.fire('input');
+    input.$.input.fire('input');
 
     return appearanceBrowserProxy.whenCalled('validateStartupPage')
         .then(function() {
           Polymer.dom.flush();
           assertEquals(input.value, '@@@');
           assertTrue(input.invalid);
 
           // Should reset to default value on change event.
-          input.$$('paper-input').fire('change');
+          input.$.input.fire('change');
           Polymer.dom.flush();
           assertEquals(input.value, 'test');
         });
   });
 });