Implement the inert attribute

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

Index: third_party/WebKit/Source/modules/accessibility/AXMenuListPopup.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXMenuListPopup.cpp b/third_party/WebKit/Source/modules/accessibility/AXMenuListPopup.cpp
index 713c4e5c42bba37376d8b1e4897eff9c3cd1b52b..8e7332da5a64722ab513fefb2412b69833ac1fd1 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXMenuListPopup.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXMenuListPopup.cpp
@@ -66,9 +66,13 @@ AXMenuListOption* AXMenuListPopup::MenuListOptionAXObject(
     return 0;
 
   AXObject* object = AxObjectCache().GetOrCreate(element);
-  if (!object || !object->IsMenuListOption())
+  LOG(INFO) << "Created " << object;
+  if (!object || !object->IsMenuListOption()) {
+    LOG(INFO) << "!object || !object->IsMenuListOption(): " << object;
     return 0;
+  }
 
+  LOG(INFO) << "Returning object " << object;
   return ToAXMenuListOption(object);
 }
 
@@ -108,15 +112,25 @@ void AXMenuListPopup::AddChildren() {
     active_index_ = GetSelectedIndex();
 
   for (const auto& option_element : html_select_element->GetOptionList()) {
+    LOG(INFO) << "Getting option for element";
     AXMenuListOption* option = MenuListOptionAXObject(option_element);
+    LOG(INFO) << "Got option: " << option;
     if (option) {
+      LOG(INFO) << "Setting parent on option " << option;
       option->SetParent(this);
       children_.push_back(option);
+    } else {
+      LOG(INFO) << "no option";
     }
   }
 }
 
 void AXMenuListPopup::UpdateChildrenIfNecessary() {
+  LOG(INFO) << "AXMenuListPopup::UpdateChildrenIfNecessary";
+  LOG(INFO) << "have_children_: " << have_children_ << "; parent_: " << parent_;
+  if (parent_)
+    LOG(INFO) << "parent_->NeedsToUpdateChildren(): "
+              << parent_->NeedsToUpdateChildren();
   if (have_children_ && parent_ && parent_->NeedsToUpdateChildren())
     ClearChildren();