Reify type params on map literals

test/codegen_expected/stack_trace/stack_trace.js

 dart_library.library('stack_trace', null, /* Imports */[
   'dart_sdk',
   'path'
 ], function load__stack_trace(exports, dart_sdk, path) {
   'use strict';
   const core = dart_sdk.core;
   const async = dart_sdk.async;
   const _interceptors = dart_sdk._interceptors;
   const math = dart_sdk.math;
   const dart = dart_sdk.dart;
@@ skipping 58 matching lines @@
         }
         let spec = new src__stack_zone_specification.StackZoneSpecification(onError);
         return T.as(async.runZoned(dart.dynamic)(dart.fn(() => {
           try {
             return callback();
           } catch (error) {
             let stackTrace = dart.stackTrace(error);
             return async.Zone.current.handleUncaughtError(dart.dynamic)(error, stackTrace);
           }
 
-        }, VoidTodynamic()), {zoneSpecification: spec.toSpec(), zoneValues: dart.map([const$0 || (const$0 = dart.const(core.Symbol.new('stack_trace.stack_zone.spec'))), spec])}));
+        }, VoidTodynamic()), {zoneSpecification: spec.toSpec(), zoneValues: dart.map([const$0 || (const$0 = dart.const(core.Symbol.new('stack_trace.stack_zone.spec'))), spec], core.Symbol, src__stack_zone_specification.StackZoneSpecification)}));
       };
     }
     static track(futureOrStream) {
       return futureOrStream;
     }
     static current(level) {
       if (level === void 0) level = 0;
       if (src__chain.Chain._currentSpec != null) return src__chain.Chain._currentSpec.currentChain(dart.notNull(level) + 1);
       return new src__chain.Chain(JSArrayOfTrace().of([src__trace.Trace.current(dart.notNull(level) + 1)]));
     }
@@ skipping 697 matching lines @@
   exports.src__chain = src__chain;
   exports.src__frame = src__frame;
   exports.src__lazy_trace = src__lazy_trace;
   exports.src__stack_zone_specification = src__stack_zone_specification;
   exports.src__trace = src__trace;
   exports.src__unparsed_frame = src__unparsed_frame;
   exports.src__utils = src__utils;
   exports.src__vm_trace = src__vm_trace;
   exports.stack_trace = stack_trace;
 });