MD Settings: checkbox: Support inverted when setting pref

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

Index: chrome/test/data/webui/settings/settings_toggle_button_tests.js
diff --git a/chrome/test/data/webui/settings/settings_toggle_button_tests.js b/chrome/test/data/webui/settings/settings_toggle_button_tests.js
index 151dfa9d4a72241fe8be67141c53cfdde2d400d2..8df425edaf1de34208b228f482255154ee2f14d2 100644
--- a/chrome/test/data/webui/settings/settings_toggle_button_tests.js
+++ b/chrome/test/data/webui/settings/settings_toggle_button_tests.js
@@ -64,6 +64,27 @@ cr.define('settings_toggle_button', function() {
         assertFalse(testElement.$.control.checked);
       });
 
+      test('inverted', function() {
+        testElement.setAttribute('inverted', '');

[Dan Beam, 2017/03/01 00:27:00]

nit: testElement.inverted = true;

[stevenjb, 2017/03/01 00:35:13]

Done.

+        var pref = {
+          key: 'test',
+          type: chrome.settingsPrivate.PrefType.BOOLEAN,
+          value: true
+        };
+        testElement.set('pref', pref);

[Dan Beam, 2017/03/01 00:27:00]

nit:

testElement.set('pref', {
  key: 'test',
  type: chrome.settingsPrivate.PrefType.BOOLEAN,
  value: true
});

[stevenjb, 2017/03/01 00:35:13]

Done.

+
+        assertTrue(testElement.pref.value);
+        assertFalse(testElement.checked);
+
+        MockInteractions.tap(testElement.$.control);
+        assertFalse(testElement.pref.value);
+        assertTrue(testElement.checked);
+
+        MockInteractions.tap(testElement.$.control);
+        assertTrue(testElement.pref.value);
+        assertFalse(testElement.checked);
+      });
+
       test('numerical pref', function() {
         var prefNum = {
           key: 'test',