Move some AX attrs from AXNodeData to AXTreeData.

content/browser/accessibility/snapshot_ax_tree_browsertest.cc

Index: content/browser/accessibility/snapshot_ax_tree_browsertest.cc
diff --git a/content/browser/accessibility/snapshot_ax_tree_browsertest.cc b/content/browser/accessibility/snapshot_ax_tree_browsertest.cc
index 9f47aaf2e54f81de02d8915c21c5d0a7b04f247f..af82404c1766b2d6a744a119f8fc5b6d322a4d9c 100644
--- a/content/browser/accessibility/snapshot_ax_tree_browsertest.cc
+++ b/content/browser/accessibility/snapshot_ax_tree_browsertest.cc
@@ -24,15 +24,15 @@ class AXTreeSnapshotWaiter {
     loop_runner_->Run();
   }
 
-  const SimpleAXTreeUpdate& snapshot() const { return snapshot_; }
+  const ui::AXTreeUpdate& snapshot() const { return snapshot_; }
 
-  void ReceiveSnapshot(const SimpleAXTreeUpdate& snapshot) {
+  void ReceiveSnapshot(const ui::AXTreeUpdate& snapshot) {
     snapshot_ = snapshot;
     loop_runner_->Quit();
   }
 
  private:
-  SimpleAXTreeUpdate snapshot_;
+  ui::AXTreeUpdate snapshot_;
   scoped_refptr<MessageLoopRunner> loop_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(AXTreeSnapshotWaiter);