Implement aria-modal

third_party/WebKit/Source/web/WebAXObject.cpp

Index: third_party/WebKit/Source/web/WebAXObject.cpp
diff --git a/third_party/WebKit/Source/web/WebAXObject.cpp b/third_party/WebKit/Source/web/WebAXObject.cpp
index ae78fdf3474c87aa3c512fd20b22a29f32b7f595..8d0abccd994d975d4ff0c77dcdbc3d01e0779a40 100644
--- a/third_party/WebKit/Source/web/WebAXObject.cpp
+++ b/third_party/WebKit/Source/web/WebAXObject.cpp
@@ -358,6 +358,13 @@ bool WebAXObject::isLoaded() const {
   return m_private->isLoaded();
 }
 
+bool WebAXObject::isModal() const {
+  if (isDetached())
+    return false;
+
+  return m_private->isModal();
+}
+
 bool WebAXObject::isMultiSelectable() const {
   if (isDetached())
     return false;