Move some AX attrs from AXNodeData to AXTreeData.

ui/accessibility/ax_serializable_tree.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_ACCESSIBILITY_AX_SERIALIZABLE_TREE_H_
 #define UI_ACCESSIBILITY_AX_SERIALIZABLE_TREE_H_
 
 #include "ui/accessibility/ax_tree.h"
 #include "ui/accessibility/ax_tree_source.h"
 
 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
 
 #endif  // UI_ACCESSIBILITY_AX_TREE_H_