AX checked state changes

chrome/test/data/extensions/api_test/automation/tests/tabs/attributes.js

Index: chrome/test/data/extensions/api_test/automation/tests/tabs/attributes.js
diff --git a/chrome/test/data/extensions/api_test/automation/tests/tabs/attributes.js b/chrome/test/data/extensions/api_test/automation/tests/tabs/attributes.js
index 5e464a579086044a20a8a4bad6bb821845ee2073..92f65aeb245550f42910047217b80e82eb837f48 100644
--- a/chrome/test/data/extensions/api_test/automation/tests/tabs/attributes.js
+++ b/chrome/test/data/extensions/api_test/automation/tests/tabs/attributes.js
@@ -258,6 +258,28 @@ var allTests = [
     assertEq(chrome.automation.NameFromType.ATTRIBUTE, textarea.nameFrom);
     chrome.test.succeed();
   },
+
+  function testCheckedAttribute() {
+    // Checkbox can use all 3 checked attribute values: true|false|mixed
+    var checkTest1 = rootNode.find({ attributes: { name: 'check-test-1' } });
+    assertTrue(Boolean(checkTest1));
+    assertEq(checkTest1.checked, 'true');
+
+    var checkTest2 = rootNode.find({ attributes: { name: 'check-test-2' } });
+    assertTrue(Boolean(checkTest2));
+    assertEq(checkTest2.checked, 'false');
+
+    var checkTest3 = rootNode.find({ attributes: { name: 'check-test-3' } });
+    assertTrue(Boolean(checkTest3));
+    assertEq(checkTest3.checked, 'mixed');
+
+    // Uncheckable nodes have a checked attribute of undefined
+    var checkTest4 = rootNode.find({ attributes: { name: 'check-test-4' } });
+    assertTrue(Boolean(checkTest4));
+    assertEq(checkTest4.checked, undefined);
+
+    chrome.test.succeed();
+  },
 ];
 
 setUpAndRunTests(allTests, 'attributes.html');