Add --modules=node support

lib/runtime/dart/html_common.js

Index: lib/runtime/dart/html_common.js
diff --git a/lib/runtime/dart/html_common.js b/lib/runtime/dart/html_common.js
index 9fb0e08e579778e69c10a0f6c676f58d53ec800c..5cc0dec8d17fdf2d1cbaf7657f6044c7f97ec096 100644
--- a/lib/runtime/dart/html_common.js
+++ b/lib/runtime/dart/html_common.js
@@ -10,7 +10,7 @@ dart_library.library('dart/html_common', null, /* Imports */[
   'dart/collection',
   'dart/_internal'
 ], /* Lazy imports */[
-], function(exports, dart, _metadata, core, html, typed_data, _js_helper, _native_typed_data, async, collection, _internal) {
+], function(exports, dart, _metadata, core, html, typed_data, _js_helper, _native_typed_data, $async, collection, _internal) {
   'use strict';
   let dartx = dart.dartx;
   dart.export(exports, _metadata);
@@ -609,13 +609,13 @@ dart_library.library('dart/html_common', null, /* Imports */[
   }
   dart.fn(isJavaScriptPromise, core.bool, [dart.dynamic]);
   function convertNativePromiseToDartFuture(promise) {
-    let completer = async.Completer.new();
+    let completer = $async.Completer.new();
     let then = dart.dcall(/* Unimplemented unknown name */convertDartClosureToJS, dart.fn(result => completer.complete(result), dart.void, [dart.dynamic]), 1);
     let error = dart.dcall(/* Unimplemented unknown name */convertDartClosureToJS, dart.fn(result => completer.completeError(result), dart.void, [dart.dynamic]), 1);
     let newPromise = promise.then(then).catch(error);
     return completer.future;
   }
-  dart.fn(convertNativePromiseToDartFuture, async.Future, [dart.dynamic]);
+  dart.fn(convertNativePromiseToDartFuture, $async.Future, [dart.dynamic]);
   class Device extends core.Object {
     static get userAgent() {
       return dart.as(dart.dload(html.window.navigator.raw, 'userAgent'), core.String);