Add --modules=node support

lib/runtime/dart/html.js

 dart_library.library('dart/html', null, /* Imports */[
   'dart/_runtime',
   'dart/math',
   'dart/core',
   'dart/_js_helper',
   'dart/collection',
   'dart/async',
   'dart/_foreign_helper',
   'dart/isolate'
 ], /* Lazy imports */[
@@ skipping 12409 matching lines @@
       forward: [dart.void, []],
       go: [dart.void, [core.int]]
     }),
     statics: () => ({_createSafe: [HistoryBase, [dart.dynamic]]}),
     names: ['_createSafe']
   });
   class Platform extends core.Object {}
   Platform.supportsSimd = false;
   dart.defineLazyProperties(Platform, {
     get supportsTypedData() {
-      return !!window.ArrayBuffer;
+      return !!dart.global.ArrayBuffer;
     }
   });
   function _wrapZone(callback) {
     if (dart.equals(async.Zone.current, async.Zone.ROOT)) return callback;
     if (callback == null) return null;
     return async.Zone.current.bindUnaryCallback(callback, {runGuarded: true});
   }
   dart.fn(_wrapZone, dart.dynamic, [dart.functionType(dart.dynamic, [dart.dynamic])]);
   function _wrapBinaryZone(callback) {
     if (dart.equals(async.Zone.current, async.Zone.ROOT)) return callback;
@@ skipping 219 matching lines @@
   dart.setSignature(_ValidatingTreeSanitizer, {
     constructors: () => ({_ValidatingTreeSanitizer: [_ValidatingTreeSanitizer, [NodeValidator]]}),
     methods: () => ({
       sanitizeTree: [dart.void, [Node]],
       [_removeNode]: [dart.void, [Node, Node]],
       [_sanitizeUntrustedElement]: [dart.void, [dart.dynamic, Node]],
       [_sanitizeElement]: [dart.void, [Element, Node, core.bool, core.String, core.String, core.Map, core.String]],
       sanitizeNode: [dart.void, [Node, Node]]
     })
   });
+  dart.defineLazyProperties(exports, {
+    get window() {
+      return dart.as(wrap_jso(dart.global), Window);
+    }
+  });
   dart.copyProperties(exports, {
-    get window() {
-      return dart.as(wrap_jso(window), Window);
-    },
     get document() {
       return dart.as(wrap_jso(document), HtmlDocument);
     }
   });
   class _EntryArray extends core.Object {}
   _EntryArray[dart.implements] = () => [core.List$(dart.dynamic)];
   _EntryArray[dart.metadata] = () => [dart.const(new _js_helper.Native("EntryArray"))];
   function spawnDomUri(uri, args, message) {
     dart.throw(new core.UnimplementedError());
   }
@@ skipping 187 matching lines @@
   exports.ElementUpgrader = ElementUpgrader;
   exports.NodeValidator = NodeValidator;
   exports.NodeTreeSanitizer = NodeTreeSanitizer;
   exports.UriPolicy = UriPolicy;
   exports.spawnDomUri = spawnDomUri;
   exports.unwrap_jso = unwrap_jso;
   exports.wrap_jso = wrap_jso;
   exports.createCustomUpgrader = createCustomUpgrader;
   exports.getHtmlCreateFunction = getHtmlCreateFunction;
 });