Test aria-pressed=mixed on windows

third_party/WebKit/LayoutTests/accessibility/option-aria-checked.html

Index: third_party/WebKit/LayoutTests/accessibility/option-aria-checked.html
diff --git a/third_party/WebKit/LayoutTests/accessibility/option-aria-checked.html b/third_party/WebKit/LayoutTests/accessibility/option-aria-checked.html
index d109e0999e42ce052de0ca5dcffb487e8b501ee9..2a5435f4cc5481aa6ee20740611dd01fb8b271d5 100644
--- a/third_party/WebKit/LayoutTests/accessibility/option-aria-checked.html
+++ b/third_party/WebKit/LayoutTests/accessibility/option-aria-checked.html
@@ -19,27 +19,27 @@
 
   test(function(t) {
     var ax = axElementById("element1");
-    assert_false(ax.isChecked);
+    assert_equals(ax.checkedState, "false");
   }, "<option> of role menuitemcheckbox is not checked by default");
 
   test(function(t) {
     var ax = axElementById("element2");
-    assert_true(ax.isChecked);
+    assert_equals(ax.checkedState, "true");
   }, "<option> of role menuitemcheckbox can be checked with aria-checked");
 
   test(function(t) {
     var ax = axElementById("element3");
-    assert_false(ax.isChecked);
+    assert_equals(ax.checkedState, "false");
   }, "<option> of role menuitemradio is not checked by default");
 
   test(function(t) {
     var ax = axElementById("element4");
-    assert_true(ax.isChecked);
+    assert_equals(ax.checkedState, "true");
   }, "<option> of role menuitemradio can be checked with aria-checked");
 
   test(function(t) {
     var ax = axElementById("element5");
-    assert_false(ax.isChecked);
+    assert_equals(ax.checkedState, "false");
   }, "<option> of no role is not checked even with aria-checked set");
 
 </script>