fix static members in _emitMemberName

lib/runtime/dart/_isolate_helper.js

 var _isolate_helper;
 (function(exports) {
   'use strict';
   // Function _serializeMessage: (dynamic) → dynamic
   function _serializeMessage(message) {
     return new _Serializer().serialize(message);
   }
   // Function _deserializeMessage: (dynamic) → dynamic
   function _deserializeMessage(message) {
     return new _Deserializer().deserialize(message);
   }
   // Function _clone: (dynamic) → dynamic
   function _clone(message) {
     let serializer = new _Serializer({serializeSendPorts: false});
     let deserializer = new _Deserializer();
     return deserializer.deserialize(serializer.serialize(message));
   }
   let _serializeSendPorts = Symbol('_serializeSendPorts');
   let _workerId = Symbol('_workerId');
   let _isolateId = Symbol('_isolateId');
   let _receivePortId = Symbol('_receivePortId');
   let _id = Symbol('_id');
   let _receivePort = Symbol('_receivePort');
-  let _getJSFunctionName = Symbol('_getJSFunctionName');
   class _Serializer extends core.Object {
     _Serializer(opts) {
       let serializeSendPorts = opts && 'serializeSendPorts' in opts ? opts.serializeSendPorts : true;
       this.serializedObjectIds = new core.Map$(dart.dynamic, core.int).identity();
       this[_serializeSendPorts] = dart.as(serializeSendPorts, core.bool);
     }
     serialize(x) {
       if (this.isPrimitive(x))
         return this.serializePrimitive(x);
       let serializationId = this.serializedObjectIds.get(x);
@@ skipping 100 matching lines @@
       if (this[_serializeSendPorts]) {
         let workerId = exports._globalState.currentManagerId;
         return ['sendport', workerId, x[_isolateId], x[_receivePort][_id]];
       }
       return ['raw sendport', x];
     }
     serializeCapability(x) {
       return ['capability', x[_id]];
     }
     serializeClosure(x) {
-      let name = IsolateNatives[_getJSFunctionName](x);
+      let name = IsolateNatives._getJSFunctionName(x);
       if (name == null) {
         this.unsupported(x, "Closures can't be transmitted:");
       }
       return ['function', name];
     }
     serializeDartObject(x) {
       let classExtractor = _foreign_helper.JS_EMBEDDED_GLOBAL('', _js_embedded_names.CLASS_ID_EXTRACTOR);
       let fieldsExtractor = _foreign_helper.JS_EMBEDDED_GLOBAL('', _js_embedded_names.CLASS_FIELDS_EXTRACTOR);
       let classId = classExtractor(x);
       let fields = dart.as(fieldsExtractor(x), core.List);
       return ['dart', classId, this.serializeArrayInPlace(dart.as(fields, _interceptors.JSArray))];
     }
   }
   let _adjustSendPorts = Symbol('_adjustSendPorts');
-  let _getJSFunctionFromName = Symbol('_getJSFunctionFromName');
   class _Deserializer extends core.Object {
     _Deserializer(opts) {
       let adjustSendPorts = opts && 'adjustSendPorts' in opts ? opts.adjustSendPorts : true;
       this.deserializedObjects = new core.List();
       this[_adjustSendPorts] = dart.as(adjustSendPorts, core.bool);
     }
     deserialize(x) {
       if (this.isPrimitive(x))
         return this.deserializePrimitive(x);
       if (!dart.is(x, _interceptors.JSArray))
@@ skipping 155 matching lines @@
       let o = {};
       this.deserializedObjects[core.$add](o);
       for (let i = 0; dart.notNull(i) < dart.notNull(keys[core.$length]); i = dart.notNull(i) + 1) {
         o[keys[core.$get](i)] = this.deserialize(values[core.$get](i));
       }
       return o;
     }
     deserializeClosure(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'function'));
       let name = dart.as(dart.dindex(x, 1), core.String);
-      let result = dart.as(IsolateNatives[_getJSFunctionFromName](name), core.Function);
+      let result = dart.as(IsolateNatives._getJSFunctionFromName(name), core.Function);
       this.deserializedObjects[core.$add](result);
       return result;
     }
     deserializeDartObject(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'dart'));
       let classId = dart.as(dart.dindex(x, 1), core.String);
       let fields = dart.as(dart.dindex(x, 2), core.List);
       let instanceFromClassId = _foreign_helper.JS_EMBEDDED_GLOBAL('', _js_embedded_names.INSTANCE_FROM_CLASS_ID);
       let initializeObject = _foreign_helper.JS_EMBEDDED_GLOBAL('', _js_embedded_names.INITIALIZE_EMPTY_INSTANCE);
       let emptyInstance = instanceFromClassId(classId);
@@ skipping 59 matching lines @@
   dart.copyProperties(exports, {
     get _globalState() {
       return dart.as(init.globalState, _Manager);
     },
     set _globalState(val) {
       init.globalState = val;
     }
   });
   let _nativeDetectEnvironment = Symbol('_nativeDetectEnvironment');
   let _nativeInitWorkerMessageHandler = Symbol('_nativeInitWorkerMessageHandler');
-  let _processWorkerMessage = Symbol('_processWorkerMessage');
-  let _serializePrintMessage = Symbol('_serializePrintMessage');
   class _Manager extends core.Object {
     get useWorkers() {
       return this.supportsWorkers;
     }
     _Manager(entry) {
       this.entry = entry;
       this.nextIsolateId = 0;
       this.currentManagerId = 0;
       this.nextManagerId = 1;
       this.currentContext = null;
@@ skipping 19 matching lines @@
       let isWorkerDefined = exports.globalWorker != null;
       this.isWorker = !dart.notNull(isWindowDefined) && dart.notNull(exports.globalPostMessageDefined);
       this.supportsWorkers = dart.notNull(this.isWorker) || dart.notNull(isWorkerDefined) && IsolateNatives.thisScript != null;
       this.fromCommandLine = !dart.notNull(isWindowDefined) && !dart.notNull(this.isWorker);
     }
     [_nativeInitWorkerMessageHandler]() {
       let func = function(f, a) {
         return function(e) {
           f(a, e);
         };
-      }(_foreign_helper.DART_CLOSURE_TO_JS(dart.bind(IsolateNatives, _processWorkerMessage)), this.mainManager);
+      }(_foreign_helper.DART_CLOSURE_TO_JS(dart.bind(IsolateNatives, '_processWorkerMessage')), this.mainManager);
       self.onmessage = func;
       self.dartPrint = self.dartPrint || function(serialize) {
         return function(object) {
           if (self.console && self.console.log) {
             self.console.log(object);
           } else {
             self.postMessage(serialize(object));
           }
         };
-      }(_foreign_helper.DART_CLOSURE_TO_JS(_Manager[_serializePrintMessage]));
+      }(_foreign_helper.DART_CLOSURE_TO_JS(_Manager._serializePrintMessage));
     }
-    static [_serializePrintMessage](object) {
+    static _serializePrintMessage(object) {
       return _serializeMessage(dart.map({command: "print", msg: object}));
     }
     maybeCloseWorker() {
       if (dart.notNull(this.isWorker) && dart.notNull(this.isolates.isEmpty) && this.topEventLoop[_activeJsAsyncCount] == 0) {
         this.mainManager.postMessage(_serializeMessage(dart.map({command: 'close'})));
       }
     }
   }
   let _controlPort = Symbol('_controlPort');
   let _scheduledControlEvents = Symbol('_scheduledControlEvents');
@@ skipping 352 matching lines @@
       return self.Worker;
     },
     get globalPostMessageDefined() {
       _js_helper.requiresPreamble();
       return !!self.postMessage;
     }
   });
   let _MainFunction = dart.typedef('_MainFunction', () => dart.functionType(dart.dynamic, []));
   let _MainFunctionArgs = dart.typedef('_MainFunctionArgs', () => dart.functionType(dart.dynamic, [dart.dynamic]));
   let _MainFunctionArgsMessage = dart.typedef('_MainFunctionArgsMessage', () => dart.functionType(dart.dynamic, [dart.dynamic, dart.dynamic]));
-  let _getEventData = Symbol('_getEventData');
-  let _startIsolate = Symbol('_startIsolate');
-  let _log = Symbol('_log');
-  let _consoleLog = Symbol('_consoleLog');
-  let _allocate = Symbol('_allocate');
-  let _startWorker = Symbol('_startWorker');
-  let _startNonWorker = Symbol('_startNonWorker');
-  let _spawnWorker = Symbol('_spawnWorker');
   class IsolateNatives extends core.Object {
     static computeThisScript() {
       let currentScript = _foreign_helper.JS_EMBEDDED_GLOBAL('', _js_embedded_names.CURRENT_SCRIPT);
       if (currentScript != null) {
         return String(currentScript.src);
       }
       if (_js_helper.Primitives.isD8)
         return IsolateNatives.computeThisScriptD8();
       if (_js_helper.Primitives.isJsshell)
         return IsolateNatives.computeThisScriptJsshell();
@@ skipping 25 matching lines @@
       pattern = new RegExp("^ *at [^(]*\\((.*):[0-9]*:[0-9]*\\)$", "m");
       matches = stack.match(pattern);
       if (matches != null)
         return matches[1];
       pattern = new RegExp("^[^@]*@(.*):[0-9]*$", "m");
       matches = stack.match(pattern);
       if (matches != null)
         return matches[1];
       throw new core.UnsupportedError(`Cannot extract URI from "${stack}"`);
     }
-    static [_getEventData](e) {
+    static _getEventData(e) {
       return e.data;
     }
-    static [_processWorkerMessage](sender, e) {
-      let msg = _deserializeMessage(IsolateNatives[_getEventData](e));
+    static _processWorkerMessage(sender, e) {
+      let msg = _deserializeMessage(IsolateNatives._getEventData(e));
       switch (dart.dindex(msg, 'command')) {
         case 'start':
         {
           exports._globalState.currentManagerId = dart.as(dart.dindex(msg, 'id'), core.int);
           let functionName = dart.as(dart.dindex(msg, 'functionName'), core.String);
-          let entryPoint = dart.as(functionName == null ? exports._globalState.entry : IsolateNatives[_getJSFunctionFromName](functionName), core.Function);
+          let entryPoint = dart.as(functionName == null ? exports._globalState.entry : IsolateNatives._getJSFunctionFromName(functionName), core.Function);
           let args = dart.dindex(msg, 'args');
           let message = _deserializeMessage(dart.dindex(msg, 'msg'));
           let isSpawnUri = dart.dindex(msg, 'isSpawnUri');
           let startPaused = dart.dindex(msg, 'startPaused');
           let replyTo = _deserializeMessage(dart.dindex(msg, 'replyTo'));
           let context = new _IsolateContext();
           exports._globalState.topEventLoop.enqueue(context, () => {
-            IsolateNatives[_startIsolate](entryPoint, dart.as(args, core.List$(core.String)), message, dart.as(isSpawnUri, core.bool), dart.as(startPaused, core.bool), dart.as(replyTo, isolate.SendPort));
+            IsolateNatives._startIsolate(entryPoint, dart.as(args, core.List$(core.String)), message, dart.as(isSpawnUri, core.bool), dart.as(startPaused, core.bool), dart.as(replyTo, isolate.SendPort));
           }, 'worker-start');
           exports._globalState.currentContext = context;
           exports._globalState.topEventLoop.run();
           break;
         }
         case 'spawn-worker':
         {
           if (IsolateNatives.enableSpawnWorker != null)
             IsolateNatives.handleSpawnWorkerRequest(msg);
           break;
         }
         case 'message':
         {
           let port = dart.as(dart.dindex(msg, 'port'), isolate.SendPort);
           if (port != null) {
             dart.dsend(dart.dindex(msg, 'port'), 'send', dart.dindex(msg, 'msg'));
           }
           exports._globalState.topEventLoop.run();
           break;
         }
         case 'close':
         {
           exports._globalState.managers.remove(IsolateNatives.workerIds.get(sender));
           sender.terminate();
           exports._globalState.topEventLoop.run();
           break;
         }
         case 'log':
         {
-          IsolateNatives[_log](dart.dindex(msg, 'msg'));
+          IsolateNatives._log(dart.dindex(msg, 'msg'));
           break;
         }
         case 'print':
         {
           if (exports._globalState.isWorker) {
             exports._globalState.mainManager.postMessage(_serializeMessage(dart.map({command: 'print', msg: msg})));
           } else {
             core.print(dart.dindex(msg, 'msg'));
           }
           break;
         }
         case 'error':
         {
           throw dart.dindex(msg, 'msg');
         }
       }
     }
     static handleSpawnWorkerRequest(msg) {
       let replyPort = dart.dindex(msg, 'replyPort');
       IsolateNatives.spawn(dart.as(dart.dindex(msg, 'functionName'), core.String), dart.as(dart.dindex(msg, 'uri'), core.String), dart.as(dart.dindex(msg, 'args'), core.List$(core.String)), dart.dindex(msg, 'msg'), false, dart.as(dart.dindex(msg, 'isSpawnUri'), core.bool), dart.as(dart.dindex(msg, 'startPaused'), core.bool)).then(msg => {
         dart.dsend(replyPort, 'send', msg);
       }, {
         onError: errorMessage => {
           dart.dsend(replyPort, 'send', [_SPAWN_FAILED_SIGNAL, errorMessage]);
         }
       });
     }
-    static [_log](msg) {
+    static _log(msg) {
       if (exports._globalState.isWorker) {
         exports._globalState.mainManager.postMessage(_serializeMessage(dart.map({command: 'log', msg: msg})));
       } else {
         try {
-          IsolateNatives[_consoleLog](msg);
+          IsolateNatives._consoleLog(msg);
         } catch (e) {
           let trace = dart.stackTrace(e);
           throw new core.Exception(trace);
         }
 
       }
     }
-    static [_consoleLog](msg) {
+    static _consoleLog(msg) {
       _js_helper.requiresPreamble();
       self.console.log(msg);
     }
-    static [_getJSFunctionFromName](functionName) {
+    static _getJSFunctionFromName(functionName) {
       let globalFunctionsContainer = _foreign_helper.JS_EMBEDDED_GLOBAL("", _js_embedded_names.GLOBAL_FUNCTIONS);
       return globalFunctionsContainer[functionName]();
     }
-    static [_getJSFunctionName](f) {
+    static _getJSFunctionName(f) {
       return dart.as(dart.is(f, _js_helper.Closure) ? f.$name : null, core.String);
     }
-    static [_allocate](ctor) {
+    static _allocate(ctor) {
       return new ctor();
     }
     static spawnFunction(topLevelFunction, message, startPaused) {
       IsolateNatives.enableSpawnWorker = true;
-      let name = IsolateNatives[_getJSFunctionName](topLevelFunction);
+      let name = IsolateNatives._getJSFunctionName(topLevelFunction);
       if (name == null) {
         throw new core.UnsupportedError("only top-level functions can be spawned.");
       }
       let isLight = false;
       let isSpawnUri = false;
       return IsolateNatives.spawn(name, null, null, message, isLight, isSpawnUri, startPaused);
     }
     static spawnUri(uri, args, message, startPaused) {
       IsolateNatives.enableSpawnWorker = true;
       let isLight = false;
       let isSpawnUri = true;
       return IsolateNatives.spawn(null, dart.toString(uri), args, message, isLight, isSpawnUri, startPaused);
     }
     static spawn(functionName, uri, args, message, isLight, isSpawnUri, startPaused) {
       if (uri != null && dart.notNull(uri.endsWith(".dart"))) {
         uri = dart.notNull(uri) + ".js";
       }
       let port = new isolate.ReceivePort();
       let completer = new (async.Completer$(core.List))();
       port.first.then(msg => {
         if (dart.equals(dart.dindex(msg, 0), _SPAWNED_SIGNAL)) {
           completer.complete(msg);
         } else {
           dart.assert(dart.equals(dart.dindex(msg, 0), _SPAWN_FAILED_SIGNAL));
           completer.completeError(dart.dindex(msg, 1));
         }
       });
       let signalReply = port.sendPort;
       if (dart.notNull(exports._globalState.useWorkers) && !dart.notNull(isLight)) {
-        IsolateNatives[_startWorker](functionName, uri, args, message, isSpawnUri, startPaused, signalReply, message => completer.completeError(message));
+        IsolateNatives._startWorker(functionName, uri, args, message, isSpawnUri, startPaused, signalReply, message => completer.completeError(message));
       } else {
-        IsolateNatives[_startNonWorker](functionName, uri, args, message, isSpawnUri, startPaused, signalReply);
+        IsolateNatives._startNonWorker(functionName, uri, args, message, isSpawnUri, startPaused, signalReply);
       }
       return completer.future;
     }
-    static [_startWorker](functionName, uri, args, message, isSpawnUri, startPaused, replyPort, onError) {
+    static _startWorker(functionName, uri, args, message, isSpawnUri, startPaused, replyPort, onError) {
       if (args != null)
         args = new core.List$(core.String).from(args);
       if (exports._globalState.isWorker) {
         exports._globalState.mainManager.postMessage(_serializeMessage(dart.map({command: 'spawn-worker', functionName: functionName, args: args, msg: message, uri: uri, isSpawnUri: isSpawnUri, startPaused: startPaused, replyPort: replyPort})));
       } else {
-        IsolateNatives[_spawnWorker](functionName, uri, args, message, isSpawnUri, startPaused, replyPort, onError);
+        IsolateNatives._spawnWorker(functionName, uri, args, message, isSpawnUri, startPaused, replyPort, onError);
       }
     }
-    static [_startNonWorker](functionName, uri, args, message, isSpawnUri, startPaused, replyPort) {
+    static _startNonWorker(functionName, uri, args, message, isSpawnUri, startPaused, replyPort) {
       if (uri != null) {
         throw new core.UnsupportedError("Currently spawnUri is not supported without web workers.");
       }
       message = _clone(message);
       if (args != null)
         args = new core.List$(core.String).from(args);
       exports._globalState.topEventLoop.enqueue(new _IsolateContext(), () => {
-        let func = IsolateNatives[_getJSFunctionFromName](functionName);
-        IsolateNatives[_startIsolate](dart.as(func, core.Function), args, message, isSpawnUri, startPaused, replyPort);
+        let func = IsolateNatives._getJSFunctionFromName(functionName);
+        IsolateNatives._startIsolate(dart.as(func, core.Function), args, message, isSpawnUri, startPaused, replyPort);
       }, 'nonworker start');
     }
     static get currentIsolate() {
       let context = dart.as(_foreign_helper.JS_CURRENT_ISOLATE_CONTEXT(), _IsolateContext);
       return new isolate.Isolate(context.controlPort.sendPort, {pauseCapability: context.pauseCapability, terminateCapability: context.terminateCapability});
     }
-    static [_startIsolate](topLevel, args, message, isSpawnUri, startPaused, replyTo) {
+    static _startIsolate(topLevel, args, message, isSpawnUri, startPaused, replyTo) {
       let context = dart.as(_foreign_helper.JS_CURRENT_ISOLATE_CONTEXT(), _IsolateContext);
       _js_helper.Primitives.initializeStatics(context.id);
       replyTo.send([_SPAWNED_SIGNAL, context.controlPort.sendPort, context.pauseCapability, context.terminateCapability]);
       // Function runStartFunction: () → void
       function runStartFunction() {
         context.initialized = true;
         if (!dart.notNull(isSpawnUri)) {
           dart.dcall(topLevel, message);
         } else if (dart.is(topLevel, _MainFunctionArgsMessage)) {
           dart.dcall(topLevel, args, message);
         } else if (dart.is(topLevel, _MainFunctionArgs)) {
           dart.dcall(topLevel, args);
         } else {
           dart.dcall(topLevel);
         }
       }
       if (startPaused) {
         context.addPause(context.pauseCapability, context.pauseCapability);
         exports._globalState.topEventLoop.enqueue(context, runStartFunction, 'start isolate');
       } else {
         runStartFunction();
       }
     }
-    static [_spawnWorker](functionName, uri, args, message, isSpawnUri, startPaused, replyPort, onError) {
+    static _spawnWorker(functionName, uri, args, message, isSpawnUri, startPaused, replyPort, onError) {
       if (uri == null)
         uri = IsolateNatives.thisScript;
       let worker = new Worker(uri);
       let onerrorTrampoline = function(f, u, c) {
         return function(e) {
           return f(e, u, c);
         };
       }(_foreign_helper.DART_CLOSURE_TO_JS(IsolateNatives.workerOnError), uri, onError);
       worker.onerror = onerrorTrampoline;
       let processWorkerMessageTrampoline = function(f, a) {
         return function(e) {
           e.onerror = null;
           return f(a, e);
         };
-      }(_foreign_helper.DART_CLOSURE_TO_JS(IsolateNatives[_processWorkerMessage]), worker);
+      }(_foreign_helper.DART_CLOSURE_TO_JS(IsolateNatives._processWorkerMessage), worker);
       worker.onmessage = processWorkerMessageTrampoline;
       let o = exports._globalState;
       let workerId = o.nextManagerId;
       o.nextManagerId = dart.notNull(workerId) + 1;
       IsolateNatives.workerIds.set(worker, workerId);
       exports._globalState.managers.set(workerId, worker);
       worker.postMessage(_serializeMessage(dart.map({command: 'start', id: workerId, replyTo: _serializeMessage(replyPort), args: args, msg: _serializeMessage(message), isSpawnUri: isSpawnUri, startPaused: startPaused, functionName: functionName})));
     }
     static workerOnError(event, uri, onError) {
       event.preventDefault();
@@ skipping 79 matching lines @@
       }
     }
     ['=='](other) {
       return dart.is(other, _WorkerSendPort) && dart.equals(this[_workerId], dart.dload(other, _workerId)) && dart.equals(this[_isolateId], dart.dload(other, _isolateId)) && dart.equals(this[_receivePortId], dart.dload(other, _receivePortId));
     }
     get hashCode() {
       return dart.notNull(this[_workerId]) << 16 ^ dart.notNull(this[_isolateId]) << 8 ^ dart.notNull(this[_receivePortId]);
     }
   }
   _WorkerSendPort[dart.implements] = () => [isolate.SendPort];
-  let _nextFreeId = Symbol('_nextFreeId');
   let _handler = Symbol('_handler');
   class RawReceivePortImpl extends core.Object {
     RawReceivePortImpl(handler) {
       this[_handler] = handler;
       this[_id] = (() => {
-        let x = RawReceivePortImpl[_nextFreeId];
-        RawReceivePortImpl[_nextFreeId] = dart.notNull(x) + 1;
+        let x = RawReceivePortImpl._nextFreeId;
+        RawReceivePortImpl._nextFreeId = dart.notNull(x) + 1;
         return x;
       })();
       this[_isClosed] = false;
       exports._globalState.currentContext.register(this[_id], this);
     }
     weak(handler) {
       this[_handler] = handler;
       this[_id] = (() => {
-        let x = RawReceivePortImpl[_nextFreeId];
-        RawReceivePortImpl[_nextFreeId] = dart.notNull(x) + 1;
+        let x = RawReceivePortImpl._nextFreeId;
+        RawReceivePortImpl._nextFreeId = dart.notNull(x) + 1;
         return x;
       })();
       this[_isClosed] = false;
       exports._globalState.currentContext.registerWeak(this[_id], this);
     }
-    [_controlPort]() {
+    _controlPort() {
       this[_handler] = null;
       this[_id] = 0;
       this[_isClosed] = false;
     }
     set handler(newHandler) {
       this[_handler] = newHandler;
     }
     [_close]() {
       this[_isClosed] = true;
       this[_handler] = null;
     }
     close() {
       if (this[_isClosed])
         return;
       this[_isClosed] = true;
       this[_handler] = null;
       exports._globalState.currentContext.unregister(this[_id]);
     }
     [_add](dataEvent) {
       if (this[_isClosed])
         return;
       dart.dcall(this[_handler], dataEvent);
     }
     get sendPort() {
       return new _NativeJsSendPort(this, exports._globalState.currentContext.id);
     }
   }
   RawReceivePortImpl[dart.implements] = () => [isolate.RawReceivePort];
   dart.defineNamedConstructor(RawReceivePortImpl, 'weak');
-  dart.defineNamedConstructor(RawReceivePortImpl, _controlPort);
+  dart.defineNamedConstructor(RawReceivePortImpl, '_controlPort');
   RawReceivePortImpl._nextFreeId = 1;
   let _rawPort = Symbol('_rawPort');
   let _controller = Symbol('_controller');
   class ReceivePortImpl extends async.Stream {
     ReceivePortImpl() {
       this.fromRawReceivePort(new RawReceivePortImpl(null));
     }
     weak() {
       this.fromRawReceivePort(new RawReceivePortImpl.weak(null));
     }
@@ skipping 87 matching lines @@
       return this[_handle] != null;
     }
   }
   TimerImpl[dart.implements] = () => [async.Timer];
   dart.defineNamedConstructor(TimerImpl, 'periodic');
   // Function hasTimer: () → bool
   function hasTimer() {
     _js_helper.requiresPreamble();
     return self.setTimeout != null;
   }
-  let _internal = Symbol('_internal');
   class CapabilityImpl extends core.Object {
     CapabilityImpl() {
-      this[_internal](_js_helper.random64());
+      this._internal(_js_helper.random64());
     }
-    [_internal](id) {
+    _internal(id) {
       this[_id] = id;
     }
     get hashCode() {
       let hash = this[_id];
       hash = dart.notNull(hash) >> 0 ^ (dart.notNull(hash) / 4294967296).truncate();
       hash = ~dart.notNull(hash) + (dart.notNull(hash) << 15) & 4294967295;
       hash = dart.notNull(hash) ^ dart.notNull(hash) >> 12;
       hash = dart.notNull(hash) * 5 & 4294967295;
       hash = dart.notNull(hash) ^ dart.notNull(hash) >> 4;
       hash = dart.notNull(hash) * 2057 & 4294967295;
       hash = dart.notNull(hash) ^ dart.notNull(hash) >> 16;
       return hash;
     }
     ['=='](other) {
       if (core.identical(other, this))
         return true;
       if (dart.is(other, CapabilityImpl)) {
         return core.identical(this[_id], other[_id]);
       }
       return false;
     }
   }
   CapabilityImpl[dart.implements] = () => [isolate.Capability];
-  dart.defineNamedConstructor(CapabilityImpl, _internal);
+  dart.defineNamedConstructor(CapabilityImpl, '_internal');
   // Exports:
   exports.enterJsAsync = enterJsAsync;
   exports.leaveJsAsync = leaveJsAsync;
   exports.isWorker = isWorker;
   exports.startRootIsolate = startRootIsolate;
   exports.IsolateNatives = IsolateNatives;
   exports.RawReceivePortImpl = RawReceivePortImpl;
   exports.ReceivePortImpl = ReceivePortImpl;
   exports.TimerImpl = TimerImpl;
   exports.hasTimer = hasTimer;
   exports.CapabilityImpl = CapabilityImpl;
 })(_isolate_helper || (_isolate_helper = {}));