| Index: ui/accessibility/ax_tree.h | 
| diff --git a/ui/accessibility/ax_tree.h b/ui/accessibility/ax_tree.h | 
| index 36fe655787692cdf9019357790096cd168b0f09f..95885decacbf5bb6c11f171362cabef574962159 100644 | 
| --- a/ui/accessibility/ax_tree.h | 
| +++ b/ui/accessibility/ax_tree.h | 
| @@ -83,6 +83,12 @@ class AX_EXPORT AXTreeDelegate { | 
| AXIntListAttribute attr, | 
| const std::vector<int32_t>& old_value, | 
| const std::vector<int32_t>& new_value) {} | 
| +  virtual void OnStringListAttributeChanged( | 
| +      AXTree* tree, | 
| +      AXNode* node, | 
| +      AXStringListAttribute attr, | 
| +      const std::vector<std::string>& old_value, | 
| +      const std::vector<std::string>& new_value) {} | 
|  | 
| // Called when tree data changes. | 
| virtual void OnTreeDataChanged(AXTree* tree, | 
|  |