Position info (item n of m) incorrect if hidden focusable items in list

Bug: 836997
Change-Id: I971fa7076f72d51829b36af8e379260d48ca25ec
Reviewed-on: https://chromium-review.googlesource.com/c/1450235
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Reviewed-by: Nektarios Paisios <nektar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#628890}
  bool IsChangedNode(const AXNode* node) {
    return changed_node_ids.find(node->id()) != changed_node_ids.end();
  }

  bool IsChangedNode(const AXNode* node) {
    return changed_node_ids.find(node->id()) != changed_node_ids.end();
  }
