Make first and last getters.

samples/third_party/dromaeo/tests/dom-query-html.dart

 #library("dom_query");
 #import("dart:html");
 #import('../common/common.dart');
 #import("dart:math", prefix: "Math");
 #source("Common.dart");
 #source("RunnerSuite.dart");
 
 void main() {
   final int num = 40;
 
@@ skipping 34 matching lines @@
         ret = document.$dom_getElementById('testB');
         ret = document.$dom_getElementById('testC');
         ret = document.$dom_getElementById('testD');
         ret = document.$dom_getElementById('testE');
         ret = document.$dom_getElementById('testF');
       }
     })
     .test('getElementsByTagName(div)', () {
       for (int i = 0; i < num; i++) {
         List<Element> elems = document.$dom_getElementsByTagName('div');
-        ret = elems.last().$dom_nodeType;
+        ret = elems.last.$dom_nodeType;
       }
     })
     .test('getElementsByTagName(p)', () {
       for (int i = 0; i < num; i++) {
         List<Element> elems = document.$dom_getElementsByTagName('p');
-        ret = elems.last().$dom_nodeType;
+        ret = elems.last.$dom_nodeType;
       }
     })
     .test('getElementsByTagName(a)', () {
       for (int i = 0; i < num; i++) {
         List<Element> elems = document.$dom_getElementsByTagName('a');
-        ret = elems.last().$dom_nodeType;
+        ret = elems.last.$dom_nodeType;
       }
     })
     .test('getElementsByTagName(*)', () {
       for (int i = 0; i < num; i++) {
         List<Element> elems = document.$dom_getElementsByTagName('*');
-        ret = elems.last().$dom_nodeType;
+        ret = elems.last.$dom_nodeType;
       }
     })
     .test('getElementsByTagName (not in document)', () {
       for (int i = 0; i < num; i++) {
         List<Element> elems = document.$dom_getElementsByTagName('strong');
         ret = elems.length == 0;
       }
     })
     .test('getElementsByName', () {
       for (int i = 0; i < num * 20; i++) {
@@ skipping 11 matching lines @@
       for (int i = 0; i < num * 20; i++) {
         ret = document.$dom_getElementsByName('test').length == 0;
         ret = document.$dom_getElementsByName('test').length == 0;
         ret = document.$dom_getElementsByName('test').length == 0;
         ret = document.$dom_getElementsByName('test').length == 0;
         ret = document.$dom_getElementsByName('test').length == 0;
       }
     })
     .end();
 }