Convert dart_utils.js to input_sdk/lib/_internal/utils.dart (#310)

lib/runtime/dart/js.js

 dart_library.library('dart/js', null, /* Imports */[
   "dart/_runtime",
   'dart/core',
   'dart/collection',
   'dart/_js_helper'
 ], /* Lazy imports */[
 ], function(exports, dart, core, collection, _js_helper) {
   'use strict';
   let dartx = dart.dartx;
   dart.defineLazyProperties(exports, {
@@ skipping 158 matching lines @@
   let _checkIndex = Symbol('_checkIndex');
   let _checkInsertIndex = Symbol('_checkInsertIndex');
   let JsArray$ = dart.generic(function(E) {
     class JsArray extends dart.mixin(JsObject, collection.ListMixin$(E)) {
       JsArray() {
         super._fromJs([]);
       }
       from(other) {
         super._fromJs((() => {
           let _ = [];
-          _[dartx.addAll](other[dartx.map](dart.as(_convertToJS, __CastType0)));
+          _[dartx.addAll](other[dartx.map](dart.as(_convertToJS, __CastType0$(E))));
           return _;
         })());
       }
       _fromJs(jsObject) {
         super._fromJs(jsObject);
       }
       [_checkIndex](index) {
         if (typeof index == 'number' && (dart.notNull(index) < 0 || dart.notNull(index) >= dart.notNull(this.length))) {
           dart.throw(new core.RangeError.range(index, 0, this.length));
         }
@@ skipping 231 matching lines @@
   });
   let __CastType0 = __CastType0$();
   // Exports:
   exports.JsObject = JsObject;
   exports.JsFunction = JsFunction;
   exports.JsArray$ = JsArray$;
   exports.JsArray = JsArray;
   exports.allowInterop = allowInterop;
   exports.allowInteropCaptureThis = allowInteropCaptureThis;
 });