[MD settings] show icon when slider controlled by something

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 296 matching lines @@
           assertLT(0, pointersPage.$$('#touchpad h2').offsetHeight);
         });
       });
 
       test('mouse', function() {
         expectLT(0, pointersPage.$.mouse.offsetHeight);
 
         expectFalse(pointersPage.$$('#mouse settings-toggle-button').checked);
 
         var slider = assert(pointersPage.$$('#mouse cr-slider'));
-        expectEquals(4, slider.value);
+        expectEquals(4, slider.pref.value);
         MockInteractions.pressAndReleaseKeyOn(slider.$.slider, 37 /* left */);
         expectEquals(3, devicePage.prefs.settings.mouse.sensitivity2.value);
 
         pointersPage.set('prefs.settings.mouse.sensitivity2.value', 5);
-        expectEquals(5, slider.value);
+        expectEquals(5, slider.pref.value);
       });
 
       test('touchpad', function() {
         expectLT(0, pointersPage.$.touchpad.offsetHeight);
 
         expectTrue(pointersPage.$$('#touchpad #enableTapToClick').checked);
         expectFalse(pointersPage.$$('#touchpad #enableTapDragging').checked);
 
         var slider = assert(pointersPage.$$('#touchpad cr-slider'));
-        expectEquals(3, slider.value);
-        MockInteractions.pressAndReleaseKeyOn(
-            slider.$.slider, 39 /* right */);
+        expectEquals(3, slider.pref.value);
+        MockInteractions.pressAndReleaseKeyOn(slider.$.slider, 39 /* right */);
         expectEquals(4, devicePage.prefs.settings.touchpad.sensitivity2.value);
 
         pointersPage.set('prefs.settings.touchpad.sensitivity2.value', 2);
-        expectEquals(2, slider.value);
+        expectEquals(2, slider.pref.value);
       });
 
       test('link doesn\'t activate control', function(done) {
         expectNaturalScrollValue(pointersPage, false);
 
         // Tapping the link shouldn't enable the radio button.
         var naturalScrollOn =
             pointersPage.$$('paper-radio-button[name="true"]');
         var a = naturalScrollOn.querySelector('a');
 
@@ skipping 45 matching lines @@
         cr.webUIListenerCallback(
             'show-keys-changed', showCapsLock, showDiamondKey);
         Polymer.dom.flush();
         expectTrue(!!keyboardPage.$$('#capsLockKey'));
         expectTrue(!!keyboardPage.$$('#diamondKey'));
 
         var collapse = keyboardPage.$$('iron-collapse');
         assertTrue(!!collapse);
         expectTrue(collapse.opened);
 
-        expectEquals(500, keyboardPage.$.delaySlider.value);
-        expectEquals(500, keyboardPage.$.repeatRateSlider.value);
+        expectEquals(500, keyboardPage.$.delaySlider.pref.value);
+        expectEquals(500, keyboardPage.$.repeatRateSlider.pref.value);
 
         // Test interaction with the cr-slider's underlying paper-slider.
         MockInteractions.pressAndReleaseKeyOn(
             keyboardPage.$.delaySlider.$.slider, 37 /* left */);
         MockInteractions.pressAndReleaseKeyOn(
             keyboardPage.$.repeatRateSlider.$.slider, 39 /* right */);
-        expectEquals(1000,
-            devicePage.prefs.settings.language.xkb_auto_repeat_delay_r2.value);
-        expectEquals(
-            300,
-            devicePage.prefs.settings.language.xkb_auto_repeat_interval_r2.value
-        );
+        var language = devicePage.prefs.settings.language;
+        expectEquals(1000, language.xkb_auto_repeat_delay_r2.value);
+        expectEquals(300, language.xkb_auto_repeat_interval_r2.value);
 
         // Test sliders change when prefs change.
         devicePage.set(
             'prefs.settings.language.xkb_auto_repeat_delay_r2.value', 1500);
-        expectEquals(1500, keyboardPage.$.delaySlider.value);
+        expectEquals(1500, keyboardPage.$.delaySlider.pref.value);
         devicePage.set(
             'prefs.settings.language.xkb_auto_repeat_interval_r2.value',
             2000);
-        expectEquals(2000, keyboardPage.$.repeatRateSlider.value);
+        expectEquals(2000, keyboardPage.$.repeatRateSlider.pref.value);
 
         // Test sliders round to nearest value when prefs change.
         devicePage.set(
             'prefs.settings.language.xkb_auto_repeat_delay_r2.value', 600);
-        expectEquals(500, keyboardPage.$.delaySlider.value);
+        expectEquals(500, keyboardPage.$.delaySlider.pref.value);
         devicePage.set(
             'prefs.settings.language.xkb_auto_repeat_interval_r2.value', 45);
-        expectEquals(50, keyboardPage.$.repeatRateSlider.value);
+        expectEquals(50, keyboardPage.$.repeatRateSlider.pref.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 361 matching lines @@
         assert(waitingDiv.hidden);
         assert(!selectAppDiv.hidden);
       });
     });
   });
 
   return {
     TestNames: TestNames
   };
 });