Wrapperless dart:html and friends

test/codegen/expect/expect.js

 dart_library.library('expect', null, /* Imports */[
   'dart/_runtime',
   'dart/core'
 ], /* Lazy imports */[
 ], function(exports, dart, core) {
   'use strict';
   let dartx = dart.dartx;
   class Expect extends core.Object {
     static _truncateString(string, start, end, length) {
       if (dart.notNull(end) - dart.notNull(start) > dart.notNull(length)) {
@@ skipping 110 matching lines @@
           Expect._fail(`Expect.listEquals(at index ${i}, ` + `expected: <${expected[dartx.get](i)}>, actual: <${actual[dartx.get](i)}>${msg}) fails`);
         }
       }
       if (expected[dartx.length] != actual[dartx.length]) {
         Expect._fail('Expect.listEquals(list length, ' + `expected: <${expected[dartx.length]}>, actual: <${actual[dartx.length]}>${msg}) ` + 'fails: Next element <' + `${dart.notNull(expected[dartx.length]) > dart.notNull(n) ? expected[dartx.get](n) : actual[dartx.get](n)}>`);
       }
     }
     static mapEquals(expected, actual, reason) {
       if (reason === void 0) reason = null;
       let msg = Expect._getMessage(reason);
-      for (let key of expected.keys) {
-        if (!dart.notNull(actual.containsKey(key))) {
+      for (let key of expected[dartx.keys]) {
+        if (!dart.notNull(actual[dartx.containsKey](key))) {
           Expect._fail(`Expect.mapEquals(missing expected key: <${key}>${msg}) fails`);
         }
-        Expect.equals(expected.get(key), actual.get(key));
+        Expect.equals(expected[dartx.get](key), actual[dartx.get](key));
       }
-      for (let key of actual.keys) {
-        if (!dart.notNull(expected.containsKey(key))) {
+      for (let key of actual[dartx.keys]) {
+        if (!dart.notNull(expected[dartx.containsKey](key))) {
           Expect._fail(`Expect.mapEquals(unexpected key: <${key}>${msg}) fails`);
         }
       }
     }
     static stringEquals(expected, actual, reason) {
       if (reason === void 0) reason = null;
       if (expected == actual) return;
       let msg = Expect._getMessage(reason);
       let defaultMessage = `Expect.stringEquals(expected: <${expected}>", <${actual}>${msg}) fails`;
       if (expected == null || actual == null) {
@@ skipping 148 matching lines @@
   dart.setSignature(AssumeDynamic, {
     constructors: () => ({AssumeDynamic: [AssumeDynamic, []]})
   });
   // Exports:
   exports.Expect = Expect;
   exports.ExpectException = ExpectException;
   exports.NoInline = NoInline;
   exports.TrustTypeAnnotations = TrustTypeAnnotations;
   exports.AssumeDynamic = AssumeDynamic;
 });