gistfile1.js

var Bookmark = function (url, name, tag) {
  this.url = url;
  this.name = name;
  if (tag) this.tags = [tag];
  else this.tags = [];
};

Bookmark.list = [];
Bookmark.push = function (p) { Bookmark.list.push(p) };

chrome.bookmarks.getTree(function (tree) {
  var stack = [tree[0]];

  do {
    var o = stack.pop();

    if (o.children)
      for (var i in o.children) {
        o.children[i].pTitle = o.title;
        stack.push(o.children[i]);
      }
    else Bookmark.push(new Bookmark(o.url, o.title, o.pTitle));

  } while (stack.length)
});