Fixes for tree item level, setsize and posinset

content/shell/test_runner/web_ax_object_proxy.cc

Index: content/shell/test_runner/web_ax_object_proxy.cc
diff --git a/content/shell/test_runner/web_ax_object_proxy.cc b/content/shell/test_runner/web_ax_object_proxy.cc
index 150f59e6b1b930a45b38f391272112a5dfd7369f..79e403c17241ab7053d892d2a2f24b09e275ffe8 100644
--- a/content/shell/test_runner/web_ax_object_proxy.cc
+++ b/content/shell/test_runner/web_ax_object_proxy.cc
@@ -626,6 +626,7 @@ gin::ObjectTemplateBuilder WebAXObjectProxy::GetObjectTemplateBuilder(
       .SetProperty("relevant", &WebAXObjectProxy::Relevant)
       .SetProperty("roleDescription", &WebAXObjectProxy::RoleDescription)
       .SetProperty("sort", &WebAXObjectProxy::Sort)
+      .SetProperty("hierarchicalLevel", &WebAXObjectProxy::HierarchicalLevel)
       .SetProperty("posInSet", &WebAXObjectProxy::PosInSet)
       .SetProperty("setSize", &WebAXObjectProxy::SetSize)
       .SetProperty("clickPointX", &WebAXObjectProxy::ClickPointX)
@@ -1198,6 +1199,11 @@ std::string WebAXObjectProxy::Sort() {
   }
 }
 
+int WebAXObjectProxy::HierarchicalLevel() {
+  accessibility_object_.UpdateLayoutAndCheckValidity();
+  return accessibility_object_.HierarchicalLevel();
+}
+
 int WebAXObjectProxy::PosInSet() {
   accessibility_object_.UpdateLayoutAndCheckValidity();
   return accessibility_object_.PosInSet();