Merge libv1.

samples/third_party/dromaeo/tests/dom-modify-htmlidiomatic.dart

-#library("dom_modify_html");
-#import("dart:html");
-#import("dart:json");
-#import("dart:math", prefix: "Math");
-#source("Common.dart");
-#source("RunnerSuite.dart");
+library dom_modify_html;
+import 'dart:html';
+import 'dart:json';
+import 'dart:math' as Math;
+part 'Common.dart';
+part 'RunnerSuite.dart';
 
 void main() {
   final int num = 400;
 
   String str = 'null';
   // Very ugly way to build up the string, but let's mimic JS version as much as possible.
   for (int i = 0; i < 1024; i++) {
     str = "$str${new String.fromCharCodes([((25 * Math.random()) + 97).toInt()])}";
   }
 
@@ skipping 43 matching lines @@
     .test('appendChild', () {
       for (int i = 0; i < elems.length; i++)
         document.body.nodes.add(elems[i]);
     })
     .test('insertBefore', () {
       for (int i = 0; i < elems.length; i++)
         document.body.insertBefore(elems[i], document.body.nodes.first);
     })
     .end();
 }