Move some AX attrs from AXNodeData to AXTreeData.

ui/accessibility/ax_serializable_tree.h

Index: ui/accessibility/ax_serializable_tree.h
diff --git a/ui/accessibility/ax_serializable_tree.h b/ui/accessibility/ax_serializable_tree.h
index 42b746f559d5d88b931c03decc48a58794e41c7a..d8fb9c45161e475ecbe8b734e74f46ae5e072682 100644
--- a/ui/accessibility/ax_serializable_tree.h
+++ b/ui/accessibility/ax_serializable_tree.h
@@ -13,12 +13,14 @@ namespace ui {
 class AX_EXPORT AXSerializableTree : public AXTree {
  public:
   AXSerializableTree();
-  explicit AXSerializableTree(const AXTreeUpdate<AXNodeData>& initial_state);
+  explicit AXSerializableTree(
+      const AXTreeUpdate& initial_state);
   ~AXSerializableTree() override;
 
   // Create a TreeSource adapter for this tree. The client gets ownership
   // of the return value and should delete it when done.
-  virtual AXTreeSource<const AXNode*, AXNodeData>* CreateTreeSource();
+  virtual AXTreeSource<const AXNode*, AXNodeData, AXTreeData>*
+      CreateTreeSource();
 };
 
 }  // namespace ui