Implement aria-modal

third_party/WebKit/Source/modules/accessibility/InspectorAccessibilityAgent.cpp

Index: third_party/WebKit/Source/modules/accessibility/InspectorAccessibilityAgent.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/InspectorAccessibilityAgent.cpp b/third_party/WebKit/Source/modules/accessibility/InspectorAccessibilityAgent.cpp
index 8df32816daf20dec44c87d1fd64e831e489eaf02..4ef4a5fa86e2a93091d1a13905c5583b8fcd0837 100644
--- a/third_party/WebKit/Source/modules/accessibility/InspectorAccessibilityAgent.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/InspectorAccessibilityAgent.cpp
@@ -115,6 +115,10 @@ void fillGlobalStates(AXObject& axObject,
   }
 }
 
+bool roleAllowsModal(AccessibilityRole role) {
+  return role == DialogRole || role == AlertDialogRole;
+}
+
 bool roleAllowsMultiselectable(AccessibilityRole role) {
   return role == GridRole || role == ListBoxRole || role == TabListRole ||
          role == TreeGridRole || role == TreeRole;
@@ -306,6 +310,11 @@ void fillWidgetStates(AXObject& axObject,
         createProperty(AXWidgetStatesEnum::Selected,
                        createBooleanValue(axObject.isSelected())));
   }
+
+  if (roleAllowsModal(role)) {
+    properties.addItem(createProperty(AXWidgetStatesEnum::Modal,
+                                      createBooleanValue(axObject.isModal())));
+  }
 }
 
 std::unique_ptr<AXProperty> createRelatedNodeListProperty(