Moved action verbs out of Blink.

ui/views/controls/combobox/combobox.cc

Index: ui/views/controls/combobox/combobox.cc
diff --git a/ui/views/controls/combobox/combobox.cc b/ui/views/controls/combobox/combobox.cc
index 8b32edd0d9e3d61ef122bbd8527e32e7882b7520..25304929c47b18fba106eae70dfc98664fd1ade5 100644
--- a/ui/views/controls/combobox/combobox.cc
+++ b/ui/views/controls/combobox/combobox.cc
@@ -740,6 +740,10 @@ void Combobox::GetAccessibleNodeData(ui::AXNodeData* node_data) {
   node_data->role = ui::AX_ROLE_COMBO_BOX;
   node_data->SetName(accessible_name_);
   node_data->SetValue(model_->GetItemAt(selected_index_));
+  if (enabled()) {
+    node_data->AddIntAttribute(ui::AX_ATTR_ACTION,
+                               ui::AX_SUPPORTED_ACTION_OPEN);
+  }
   node_data->AddIntAttribute(ui::AX_ATTR_POS_IN_SET, selected_index_);
   node_data->AddIntAttribute(ui::AX_ATTR_SET_SIZE, model_->GetItemCount());
 }