Implement aria-modal

components/test_runner/web_ax_object_proxy.cc

Index: components/test_runner/web_ax_object_proxy.cc
diff --git a/components/test_runner/web_ax_object_proxy.cc b/components/test_runner/web_ax_object_proxy.cc
index 21174b3a31457eaffb78b10b71541ee4093709cd..90df73a954577c1ec0c0ee0bedf8e025d17a9f49 100644
--- a/components/test_runner/web_ax_object_proxy.cc
+++ b/components/test_runner/web_ax_object_proxy.cc
@@ -599,6 +599,7 @@ WebAXObjectProxy::GetObjectTemplateBuilder(v8::Isolate* isolate) {
       .SetProperty("isRichlyEditable", &WebAXObjectProxy::IsRichlyEditable)
       .SetProperty("isFocused", &WebAXObjectProxy::IsFocused)
       .SetProperty("isFocusable", &WebAXObjectProxy::IsFocusable)
+      .SetProperty("isModal", &WebAXObjectProxy::IsModal)
       .SetProperty("isSelected", &WebAXObjectProxy::IsSelected)
       .SetProperty("isSelectable", &WebAXObjectProxy::IsSelectable)
       .SetProperty("isMultiSelectable", &WebAXObjectProxy::IsMultiSelectable)
@@ -977,6 +978,11 @@ bool WebAXObjectProxy::IsFocusable() {
   return accessibility_object_.canSetFocusAttribute();
 }
 
+bool WebAXObjectProxy::IsModal() {
+  accessibility_object_.updateLayoutAndCheckValidity();
+  return accessibility_object_.isModal();
+}
+
 bool WebAXObjectProxy::IsSelected() {
   accessibility_object_.updateLayoutAndCheckValidity();
   return accessibility_object_.isSelected();