Fix Bookmark* autocommand events.

Struct now only offers values during iteration like Array.

common/content/bookmarks.js

@@ -16,12 +16,12 @@ var Bookmarks = Module("bookmarks", {
         storage.addObserver("bookmark-cache", function (key, event, arg) {
             if (["add", "change", "remove"].indexOf(event) >= 0)
                 autocommands.trigger("Bookmark" + util.capitalize(event),
-                     iter({
+                     update({
                          bookmark: {
                              toString: function () "bookmarkcache.bookmarks[" + arg.id + "]",
                              valueOf: function () arg
                          }
-                     }, arg).toObject());
+                     }, arg.toObject()));
             bookmarks.timer.tell();
         }, window);
     },

common/modules/base.jsm

@@ -1405,6 +1405,10 @@ var StructBase = Class("StructBase", Array, {
     get: function struct_get(key, val) this[this.members[key]],
     set: function struct_set(key, val) this[this.members[key]] = val,
 
+    toObject: function struct_toObject() {
+        return iter.toObject([k, this[k]] for (k of keys(this.members)));
+    },
+
     toString: function struct_toString() Class.prototype.toString.apply(this, arguments),
 
     // Iterator over our named members