Flesh out dynamic invocation code

test/codegen/expect/dart/async.js

 var async;
 (function(exports) {
   'use strict';
   dart.copyProperties(exports, {
     get _hasDocument() {
       return dart.equals(typeof document, 'object');
     }
   });
   // Function _invokeErrorHandler: (Function, Object, StackTrace) → dynamic
   function _invokeErrorHandler(errorHandler, error, stackTrace) {
@@ skipping 4598 matching lines @@
   function _rootRegisterBinaryCallback(self, parent, zone, f) {
     return f;
   }
   // Function _rootErrorCallback: (Zone, ZoneDelegate, Zone, Object, StackTrace) → AsyncError
   function _rootErrorCallback(self, parent, zone, error, stackTrace) {
     return null;
   }
   // Function _rootScheduleMicrotask: (Zone, ZoneDelegate, Zone, () → dynamic) → void
   function _rootScheduleMicrotask(self, parent, zone, f) {
     if (!dart.notNull(core.identical(_ROOT_ZONE, zone))) {
-      let hasErrorHandler = dart.throw_("Unimplemented PrefixExpression: !_ROOT_ZONE.inSameErrorZone(zone)");
+      let hasErrorHandler = dart.dunary('!', dart.dinvoke(_ROOT_ZONE, 'inSameErrorZone', zone));
       f = zone.bindCallback(f, {runGuarded: hasErrorHandler});
     }
     _scheduleAsyncCallback(f);
   }
   // Function _rootCreateTimer: (Zone, ZoneDelegate, Zone, Duration, () → void) → Timer
   function _rootCreateTimer(self, parent, zone, duration, callback) {
     if (!dart.notNull(core.identical(_ROOT_ZONE, zone))) {
       callback = zone.bindCallback(callback);
     }
     return Timer._createTimer(duration, callback);
@@ skipping 313 matching lines @@
   exports.StreamIterator$ = StreamIterator$;
   exports.StreamController = StreamController;
   exports.StreamController$ = StreamController$;
   exports.Timer = Timer;
   exports.AsyncError = AsyncError;
   exports.ZoneSpecification = ZoneSpecification;
   exports.ZoneDelegate = ZoneDelegate;
   exports.Zone = Zone;
   exports.runZoned = runZoned;
 })(async || (async = {}));