MD Settings: cr-slider: Make display consistent and clean up.

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 373 matching lines @@
             'prefs.settings.language.xkb_auto_repeat_delay_r2.value', 1500);
         expectEquals(1500, keyboardPage.$.delaySlider.value);
         devicePage.set(
             'prefs.settings.language.xkb_auto_repeat_interval_r2.value',
             2000);
         expectEquals(2000, keyboardPage.$.repeatRateSlider.value);
 
         // Test sliders round to nearest value when prefs change.
         devicePage.set(
             'prefs.settings.language.xkb_auto_repeat_delay_r2.value', 600);
-        expectEquals(600, keyboardPage.$.delaySlider.value);
+        expectEquals(500, keyboardPage.$.delaySlider.value);
         devicePage.set(
             'prefs.settings.language.xkb_auto_repeat_interval_r2.value', 45);
-        expectEquals(45, keyboardPage.$.repeatRateSlider.value);
+        expectEquals(50, keyboardPage.$.repeatRateSlider.value);
 
         devicePage.set(
             'prefs.settings.language.xkb_auto_repeat_enabled_r2.value',
             false);
         expectFalse(collapse.opened);
 
         // Test keyboard shortcut overlay button.
         MockInteractions.tap(keyboardPage.$$('#keyboardOverlay'));
         expectEquals(
             1,
@@ skipping 116 matching lines @@
         expectTrue(displayPage.showMirror_(displayPage.displays));
         expectTrue(displayPage.isMirrored_(displayPage.displays));
       });
     });
   });
 
   return {
     TestNames: TestNames
   };
 });