Reify type params on map literals

test/codegen_expected/language/parse_closures_in_initializers_test.js

 dart_library.library('language/parse_closures_in_initializers_test', null, /* Imports */[
   'dart_sdk',
   'expect'
 ], function load__parse_closures_in_initializers_test(exports, dart_sdk, expect) {
   'use strict';
   const core = dart_sdk.core;
   const _interceptors = dart_sdk._interceptors;
   const dart = dart_sdk.dart;
   const dartx = dart_sdk.dartx;
   const expect$ = expect.expect;
   const parse_closures_in_initializers_test = Object.create(null);
   let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.functionType(dart.dynamic, [])))();
   let JSArrayOfVoidTodynamic = () => (JSArrayOfVoidTodynamic = dart.constFn(_interceptors.JSArray$(VoidTodynamic())))();
   let VoidTodynamic$ = () => (VoidTodynamic$ = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
   parse_closures_in_initializers_test.A = class A extends core.Object {
     static foo(f) {
       return dart.dcall(f);
     }
     parenthesized(y) {
       this.x = dart.fn(() => y, VoidTodynamic$());
     }
     stringLiteral(y) {
       this.x = dart.str`**${dart.fn(() => y, VoidTodynamic$())}--`;
     }
     listLiteral(y) {
       this.x = JSArrayOfVoidTodynamic().of([dart.fn(() => y, VoidTodynamic$())]);
     }
     mapLiteral(y) {
-      this.x = dart.map({fun: dart.fn(() => y, VoidTodynamic$())});
+      this.x = dart.map({fun: dart.fn(() => y, VoidTodynamic$())}, core.String, VoidTodynamic());
     }
     arg(y) {
       this.x = parse_closures_in_initializers_test.A.foo(dart.fn(() => y, VoidTodynamic$()));
     }
   };
   dart.defineNamedConstructor(parse_closures_in_initializers_test.A, 'parenthesized');
   dart.defineNamedConstructor(parse_closures_in_initializers_test.A, 'stringLiteral');
   dart.defineNamedConstructor(parse_closures_in_initializers_test.A, 'listLiteral');
   dart.defineNamedConstructor(parse_closures_in_initializers_test.A, 'mapLiteral');
   dart.defineNamedConstructor(parse_closures_in_initializers_test.A, 'arg');
@@ skipping 25 matching lines @@
     f = dart.dindex(dart.dload(a, 'x'), "fun");
     expect$.Expect.isTrue(core.Function.is(f));
     expect$.Expect.equals(314, dart.dcall(f));
     a = new parse_closures_in_initializers_test.A.arg(123);
     expect$.Expect.equals(123, dart.dload(a, 'x'));
   };
   dart.fn(parse_closures_in_initializers_test.main, VoidTodynamic$());
   // Exports:
   exports.parse_closures_in_initializers_test = parse_closures_in_initializers_test;
 });