Wrapperless dart:html and friends

lib/runtime/dart/_js_helper.js

 dart_library.library('dart/_js_helper', null, /* Imports */[
   'dart/_runtime',
   'dart/core',
   'dart/collection',
   'dart/_interceptors',
   'dart/_foreign_helper'
 ], /* Lazy imports */[
 ], function(exports, dart, core, collection, _interceptors, _foreign_helper) {
   'use strict';
   let dartx = dart.dartx;
@@ skipping 954 matching lines @@
       return Primitives.objectHashCode(object);
     }
   }
   dart.fn(objectHashCode, core.int, [dart.dynamic]);
   function fillLiteralMap(keyValuePairs, result) {
     let index = 0;
     let length = getLength(keyValuePairs);
     while (index < dart.notNull(length)) {
       let key = getIndex(keyValuePairs, index++);
       let value = getIndex(keyValuePairs, index++);
-      result.set(key, value);
+      result[dartx.set](key, value);
     }
     return result;
   }
   dart.fn(fillLiteralMap, dart.dynamic, [dart.dynamic, core.Map]);
   function jsHasOwnProperty(jsObject, property) {
     return jsObject.hasOwnProperty(property);
   }
   dart.fn(jsHasOwnProperty, core.bool, [dart.dynamic, core.String]);
   function jsPropertyAccess(jsObject, property) {
     return jsObject[property];
@@ skipping 199 matching lines @@
   exports.CastErrorImplementation = CastErrorImplementation;
   exports.FallThroughErrorImplementation = FallThroughErrorImplementation;
   exports.RuntimeError = RuntimeError;
   exports.random64 = random64;
   exports.jsonEncodeNative = jsonEncodeNative;
   exports.SyncIterator$ = SyncIterator$;
   exports.SyncIterator = SyncIterator;
   exports.SyncIterable$ = SyncIterable$;
   exports.SyncIterable = SyncIterable;
 });