Reify type params on map literals

test/codegen_expected/language/map_literal11_test.js

+dart_library.library('language/map_literal11_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__map_literal11_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const map_literal11_test = Object.create(null);
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  let dynamicTobool = () => (dynamicTobool = dart.constFn(dart.definiteFunctionType(core.bool, [dart.dynamic])))();
+  let MapTovoid = () => (MapTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [core.Map])))();
+  map_literal11_test.foo = function(m) {
+    expect$.Expect.throws(dart.fn(() => {
+      m[dartx.set](23, 23);
+    }, VoidTovoid()), dart.fn(e => core.TypeError.is(e), dynamicTobool()));
+  };
+  dart.fn(map_literal11_test.foo, MapTovoid());
+  map_literal11_test.main = function() {
+    let map = dart.map({}, core.String, dart.dynamic);
+    map_literal11_test.foo(map);
+  };
+  dart.fn(map_literal11_test.main, VoidTovoid());
+  // Exports:
+  exports.map_literal11_test = map_literal11_test;
+});