Move some AX attrs from AXNodeData to AXTreeData.

ui/accessibility/ax_serializable_tree.cc

Index: ui/accessibility/ax_serializable_tree.cc
diff --git a/ui/accessibility/ax_serializable_tree.cc b/ui/accessibility/ax_serializable_tree.cc
index 9c13fd085de47d42b899d514c601983739db6d42..c5542c95ab06df1f589455fa508acb882e34dfd2 100644
--- a/ui/accessibility/ax_serializable_tree.cc
+++ b/ui/accessibility/ax_serializable_tree.cc
@@ -15,12 +15,14 @@ namespace ui {
 // AXTree directly. Another AXTreeSource is used to abstract the Blink
 // accessibility tree.
 class AX_EXPORT AXTreeSourceAdapter
-    : public AXTreeSource<const AXNode*, AXNodeData> {
+    : public AXTreeSource<const AXNode*, AXNodeData, AXTreeData> {
  public:
   AXTreeSourceAdapter(AXTree* tree) : tree_(tree) {}
   ~AXTreeSourceAdapter() override {}
 
   // AXTreeSource implementation.
+  AXTreeData GetTreeData() const override { return tree_->data(); }
+
   AXNode* GetRoot() const override { return tree_->root(); }
 
   AXNode* GetFromId(int32 id) const override { return tree_->GetFromId(id); }
@@ -57,14 +59,14 @@ AXSerializableTree::AXSerializableTree()
     : AXTree() {}
 
 AXSerializableTree::AXSerializableTree(
-    const AXTreeUpdate<AXNodeData>& initial_state)
+    const AXTreeUpdate& initial_state)
     : AXTree(initial_state) {
 }
 
 AXSerializableTree::~AXSerializableTree() {
 }
 
-AXTreeSource<const AXNode*, AXNodeData>*
+AXTreeSource<const AXNode*, AXNodeData, AXTreeData>*
 AXSerializableTree::CreateTreeSource() {
   return new AXTreeSourceAdapter(this);
 }