Uses isEditable and isRichlyEditable to determine which attributes to expose on Mac and how to repr…

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 e7879d710b3fa7d8072973bbeb77ebc7698c541f..daca8dadf7f5b488ac3290916b12928c47a4a36a 100644
--- a/components/test_runner/web_ax_object_proxy.cc
+++ b/components/test_runner/web_ax_object_proxy.cc
@@ -508,6 +508,7 @@ WebAXObjectProxy::GetObjectTemplateBuilder(v8::Isolate* isolate) {
                    &WebAXObjectProxy::SelectionEndLineNumber)
       .SetProperty("isEnabled", &WebAXObjectProxy::IsEnabled)
       .SetProperty("isRequired", &WebAXObjectProxy::IsRequired)
+      .SetProperty("isEditable", &WebAXObjectProxy::IsEditable)
       .SetProperty("isRichlyEditable", &WebAXObjectProxy::IsRichlyEditable)
       .SetProperty("isFocused", &WebAXObjectProxy::IsFocused)
       .SetProperty("isFocusable", &WebAXObjectProxy::IsFocusable)
@@ -833,6 +834,11 @@ bool WebAXObjectProxy::IsRequired() {
   return accessibility_object_.isRequired();
 }
 
+bool WebAXObjectProxy::IsEditable() {
+  accessibility_object_.updateLayoutAndCheckValidity();
+  return accessibility_object_.isEditable();
+}
+
 bool WebAXObjectProxy::IsRichlyEditable() {
   accessibility_object_.updateLayoutAndCheckValidity();
   return accessibility_object_.isRichlyEditable();