Support numbers in settings-checkbox

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

Index: chrome/test/data/webui/settings/checkbox_tests.js
diff --git a/chrome/test/data/webui/settings/checkbox_tests.js b/chrome/test/data/webui/settings/checkbox_tests.js
index 88b0e5fdc2e441dc60b0cfdc0ff14ec94355e1f4..1e63e6885c73b27ec677c08993cb10332df58265 100644
--- a/chrome/test/data/webui/settings/checkbox_tests.js
+++ b/chrome/test/data/webui/settings/checkbox_tests.js
@@ -66,6 +66,25 @@ cr.define('settings_checkbox', function() {
         assertFalse(testElement.checked);
         assertFalse(testElement.$.checkbox.checked);
       });
+
+      test('numerical pref', function() {
+        var prefNum = {
+          key: 'test',
+          type: chrome.settingsPrivate.PrefType.NUMBER,
+          value: 1
+        };
+
+        testElement.set('pref', prefNum);
+        assertTrue(testElement.checked);
+
+        testElement.removeAttribute('checked');
+        assertFalse(testElement.checked);
+        assertEquals(0, prefNum.value);
+
+        testElement.setAttribute('checked', '');
+        assertTrue(testElement.checked);
+        assertEquals(1, prefNum.value);
+      });
     });
   }