Automatically fire AX events on Mac based on tree changes

ui/accessibility/ax_tree_fuzzer.cc

Index: ui/accessibility/ax_tree_fuzzer.cc
diff --git a/ui/accessibility/ax_tree_fuzzer.cc b/ui/accessibility/ax_tree_fuzzer.cc
index 84afea8bc6a4c7addb8f4101bdee7d04ef1117d9..6f04976634d95d36cf43cdb0a245c4d8148a32e7 100644
--- a/ui/accessibility/ax_tree_fuzzer.cc
+++ b/ui/accessibility/ax_tree_fuzzer.cc
@@ -11,7 +11,9 @@ class EmptyAXTreeDelegate : public ui::AXTreeDelegate {
   void OnNodeDataWillChange(ui::AXTree* tree,
                             const ui::AXNodeData& old_node_data,
                             const ui::AXNodeData& new_node_data) override {}
-  void OnTreeDataChanged(ui::AXTree* tree) override {}
+  void OnTreeDataChanged(ui::AXTree* tree,
+                         const ui::AXTreeData& old_data,
+                         const ui::AXTreeData& new_data) override {}
   void OnNodeWillBeDeleted(ui::AXTree* tree, ui::AXNode* node) override {}
   void OnSubtreeWillBeDeleted(ui::AXTree* tree, ui::AXNode* node) override {}
   void OnNodeWillBeReparented(ui::AXTree* tree, ui::AXNode* node) override {}