Move some AX attrs from AXNodeData to AXTreeData.

chrome/browser/ui/aura/accessibility/ax_tree_source_aura.cc

Index: chrome/browser/ui/aura/accessibility/ax_tree_source_aura.cc
diff --git a/chrome/browser/ui/aura/accessibility/ax_tree_source_aura.cc b/chrome/browser/ui/aura/accessibility/ax_tree_source_aura.cc
index ace43a5da318010b658525b53b129c1407a03f6f..856b701c222fd50a6b8d4051e2a566d6cb7f7c90 100644
--- a/chrome/browser/ui/aura/accessibility/ax_tree_source_aura.cc
+++ b/chrome/browser/ui/aura/accessibility/ax_tree_source_aura.cc
@@ -56,6 +56,14 @@ void AXTreeSourceAura::ShowContextMenu(int32 id) {
     obj->ShowContextMenu();
 }
 
+ui::AXTreeData AXTreeSourceAura::GetTreeData() const {
+  ui::AXTreeData tree_data;
+  tree_data.tree_id = 0;
+  tree_data.loaded = true;
+  tree_data.loading_progress = 1.0;
+  return tree_data;
+}
+
 AXAuraObjWrapper* AXTreeSourceAura::GetRoot() const {
   return root_.get();
 }