qualify core types: Object, Error, Symbol

lib/runtime/dart/core.js

Index: lib/runtime/dart/core.js
diff --git a/lib/runtime/dart/core.js b/lib/runtime/dart/core.js
index 7758ec7d69a34a63141a34a01a0738b9b54e5e1a..4328aceb014f292b653a9c55915da8cc5da5f0a5 100644
--- a/lib/runtime/dart/core.js
+++ b/lib/runtime/dart/core.js
@@ -9,39 +9,42 @@ dart_library.library('dart/core', null, /* Imports */[
 ], function(exports, dart, _js_helper, _internal, collection, _interceptors, convert) {
   'use strict';
   let dartx = dart.dartx;
-  class Object {
-    constructor() {
-      let name = this.constructor.name;
-      let result = void 0;
-      if (name in this)
-        result = this[name](...arguments);
-      return result === void 0 ? this : result;
-    }
-    ['=='](other) {
-      return identical(this, other);
-    }
-    get hashCode() {
-      return _js_helper.Primitives.objectHashCode(this);
-    }
-    toString() {
-      return _js_helper.Primitives.objectToString(this);
-    }
-    noSuchMethod(invocation) {
-      dart.throw(new NoSuchMethodError(this, invocation.memberName, invocation.positionalArguments, invocation.namedArguments));
-    }
-    get runtimeType() {
-      return dart.realRuntimeType(this);
+  exports.Object = (() => {
+    class Object {
+      constructor() {
+        let name = this.constructor.name;
+        let result = void 0;
+        if (name in this)
+          result = this[name](...arguments);
+        return result === void 0 ? this : result;
+      }
+      ['=='](other) {
+        return identical(this, other);
+      }
+      get hashCode() {
+        return _js_helper.Primitives.objectHashCode(this);
+      }
+      toString() {
+        return _js_helper.Primitives.objectToString(this);
+      }
+      noSuchMethod(invocation) {
+        dart.throw(new NoSuchMethodError(this, invocation.memberName, invocation.positionalArguments, invocation.namedArguments));
+      }
+      get runtimeType() {
+        return dart.realRuntimeType(this);
+      }
     }
-  }
-  dart.setSignature(Object, {
-    constructors: () => ({Object: [Object, []]}),
-    methods: () => ({
-      '==': [bool, [dart.dynamic]],
-      toString: [String, []],
-      noSuchMethod: [dart.dynamic, [Invocation]]
-    })
-  });
-  class Deprecated extends Object {
+    dart.setSignature(Object, {
+      constructors: () => ({Object: [exports.Object, []]}),
+      methods: () => ({
+        '==': [bool, [dart.dynamic]],
+        toString: [String, []],
+        noSuchMethod: [dart.dynamic, [Invocation]]
+      })
+    });
+    return Object;
+  })();
+  class Deprecated extends exports.Object {
     Deprecated(expires) {
       this.expires = expires;
     }
@@ -52,7 +55,7 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(Deprecated, {
     constructors: () => ({Deprecated: [Deprecated, [String]]})
   });
-  class _Override extends Object {
+  class _Override extends exports.Object {
     _Override() {
     }
   }
@@ -61,7 +64,7 @@ dart_library.library('dart/core', null, /* Imports */[
   });
   let deprecated = dart.const(new Deprecated("next release"));
   let override = dart.const(new _Override());
-  class _Proxy extends Object {
+  class _Proxy extends exports.Object {
     _Proxy() {
     }
   }
@@ -72,7 +75,7 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.defineExtensionNames([
     'toString'
   ]);
-  class bool extends Object {
+  class bool extends exports.Object {
     static fromEnvironment(name, opts) {
       let defaultValue = opts && 'defaultValue' in opts ? opts.defaultValue : false;
       dart.throw(new UnsupportedError('bool.fromEnvironment can only be used as a const constructor'));
@@ -90,7 +93,7 @@ dart_library.library('dart/core', null, /* Imports */[
   });
   let Comparator = Comparator$();
   let Comparable$ = dart.generic(function(T) {
-    class Comparable extends Object {
+    class Comparable extends exports.Object {
       static compare(a, b) {
         return a[dartx.compareTo](b);
       }
@@ -102,7 +105,7 @@ dart_library.library('dart/core', null, /* Imports */[
     return Comparable;
   });
   let Comparable = Comparable$();
-  class DateTime extends Object {
+  class DateTime extends exports.Object {
     DateTime(year, month, day, hour, minute, second, millisecond) {
       if (month === void 0)
         month = 1;
@@ -406,7 +409,7 @@ dart_library.library('dart/core', null, /* Imports */[
   DateTime.DECEMBER = 12;
   DateTime.MONTHS_PER_YEAR = 12;
   DateTime._MAX_MILLISECONDS_SINCE_EPOCH = 8640000000000000;
-  class num extends Object {
+  class num extends exports.Object {
     static parse(input, onError) {
       if (onError === void 0)
         onError = null;
@@ -457,8 +460,8 @@ dart_library.library('dart/core', null, /* Imports */[
   double.NEGATIVE_INFINITY = -dart.notNull(double.INFINITY);
   double.MIN_POSITIVE = 5e-324;
   double.MAX_FINITE = 1.7976931348623157e+308;
-  let _duration = dart.JsSymbol('_duration');
-  class Duration extends Object {
+  let _duration = Symbol('_duration');
+  class Duration extends exports.Object {
     Duration(opts) {
       let days = opts && 'days' in opts ? opts.days : 0;
       let hours = opts && 'hours' in opts ? opts.hours : 0;
@@ -603,49 +606,52 @@ dart_library.library('dart/core', null, /* Imports */[
   Duration.SECONDS_PER_DAY = dart.notNull(Duration.SECONDS_PER_HOUR) * dart.notNull(Duration.HOURS_PER_DAY);
   Duration.MINUTES_PER_DAY = dart.notNull(Duration.MINUTES_PER_HOUR) * dart.notNull(Duration.HOURS_PER_DAY);
   Duration.ZERO = dart.const(new Duration({seconds: 0}));
-  class Error extends Object {
-    Error() {
-    }
-    static safeToString(object) {
-      if (dart.is(object, num) || typeof object == 'boolean' || null == object) {
-        return dart.toString(object);
+  exports.Error = (() => {
+    class Error extends exports.Object {
+      Error() {
       }
-      if (typeof object == 'string') {
-        return Error._stringToSafeString(object);
+      static safeToString(object) {
+        if (dart.is(object, num) || typeof object == 'boolean' || null == object) {
+          return dart.toString(object);
+        }
+        if (typeof object == 'string') {
+          return exports.Error._stringToSafeString(object);
+        }
+        return exports.Error._objectToString(object);
+      }
+      static _stringToSafeString(string) {
+        return _js_helper.jsonEncodeNative(string);
+      }
+      static _objectToString(object) {
+        return _js_helper.Primitives.objectToString(object);
+      }
+      get stackTrace() {
+        return _js_helper.Primitives.extractStackTrace(this);
       }
-      return Error._objectToString(object);
-    }
-    static _stringToSafeString(string) {
-      return _js_helper.jsonEncodeNative(string);
-    }
-    static _objectToString(object) {
-      return _js_helper.Primitives.objectToString(object);
-    }
-    get stackTrace() {
-      return _js_helper.Primitives.extractStackTrace(this);
     }
-  }
-  dart.setSignature(Error, {
-    constructors: () => ({Error: [Error, []]}),
-    statics: () => ({
-      safeToString: [String, [Object]],
-      _stringToSafeString: [String, [String]],
-      _objectToString: [String, [Object]]
-    }),
-    names: ['safeToString', '_stringToSafeString', '_objectToString']
-  });
-  class AssertionError extends Error {
+    dart.setSignature(Error, {
+      constructors: () => ({Error: [exports.Error, []]}),
+      statics: () => ({
+        safeToString: [String, [exports.Object]],
+        _stringToSafeString: [String, [String]],
+        _objectToString: [String, [exports.Object]]
+      }),
+      names: ['safeToString', '_stringToSafeString', '_objectToString']
+    });
+    return Error;
+  })();
+  class AssertionError extends exports.Error {
     AssertionError() {
       super.Error();
     }
   }
   class TypeError extends AssertionError {}
-  class CastError extends Error {
+  class CastError extends exports.Error {
     CastError() {
       super.Error();
     }
   }
-  class NullThrownError extends Error {
+  class NullThrownError extends exports.Error {
     NullThrownError() {
       super.Error();
     }
@@ -653,8 +659,8 @@ dart_library.library('dart/core', null, /* Imports */[
       return "Throw of null.";
     }
   }
-  let _hasValue = dart.JsSymbol('_hasValue');
-  class ArgumentError extends Error {
+  let _hasValue = Symbol('_hasValue');
+  class ArgumentError extends exports.Error {
     ArgumentError(message) {
       if (message === void 0)
         message = null;
@@ -692,7 +698,7 @@ dart_library.library('dart/core', null, /* Imports */[
       if (this.name != null) {
         nameString = ` (${this.name})`;
       }
-      return `${this.message}${nameString}: ${Error.safeToString(this.invalidValue)}`;
+      return `${this.message}${nameString}: ${exports.Error.safeToString(this.invalidValue)}`;
     }
   }
   dart.defineNamedConstructor(ArgumentError, 'value');
@@ -784,7 +790,7 @@ dart_library.library('dart/core', null, /* Imports */[
     toString() {
       if (!dart.notNull(this[_hasValue]))
         return `RangeError: ${this.message}`;
-      let value = Error.safeToString(this.invalidValue);
+      let value = exports.Error.safeToString(this.invalidValue);
       let explanation = "";
       if (this.start == null) {
         if (this.end != null) {
@@ -839,7 +845,7 @@ dart_library.library('dart/core', null, /* Imports */[
     }
     toString() {
       dart.assert(this[_hasValue]);
-      let target = Error.safeToString(this.indexable);
+      let target = exports.Error.safeToString(this.indexable);
       let explanation = `index should be less than ${this.length}`;
       if (dart.notNull(dart.as(dart.dsend(this.invalidValue, '<', 0), bool))) {
         explanation = "index must not be negative";
@@ -851,7 +857,7 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(IndexError, {
     constructors: () => ({IndexError: [IndexError, [int, dart.dynamic], [String, String, int]]})
   });
-  class FallThroughError extends Error {
+  class FallThroughError extends exports.Error {
     FallThroughError() {
       super.Error();
     }
@@ -859,8 +865,8 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(FallThroughError, {
     constructors: () => ({FallThroughError: [FallThroughError, []]})
   });
-  let _className = dart.JsSymbol('_className');
-  class AbstractClassInstantiationError extends Error {
+  let _className = Symbol('_className');
+  class AbstractClassInstantiationError extends exports.Error {
     AbstractClassInstantiationError(className) {
       this[_className] = className;
       super.Error();
@@ -872,12 +878,12 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(AbstractClassInstantiationError, {
     constructors: () => ({AbstractClassInstantiationError: [AbstractClassInstantiationError, [String]]})
   });
-  let _receiver = dart.JsSymbol('_receiver');
-  let _memberName = dart.JsSymbol('_memberName');
-  let _arguments = dart.JsSymbol('_arguments');
-  let _namedArguments = dart.JsSymbol('_namedArguments');
-  let _existingArgumentNames = dart.JsSymbol('_existingArgumentNames');
-  class NoSuchMethodError extends Error {
+  let _receiver = Symbol('_receiver');
+  let _memberName = Symbol('_memberName');
+  let _arguments = Symbol('_arguments');
+  let _namedArguments = Symbol('_namedArguments');
+  let _existingArgumentNames = Symbol('_existingArgumentNames');
+  class NoSuchMethodError extends exports.Error {
     NoSuchMethodError(receiver, memberName, positionalArguments, namedArguments, existingArgumentNames) {
       if (existingArgumentNames === void 0)
         existingArgumentNames = null;
@@ -896,7 +902,7 @@ dart_library.library('dart/core', null, /* Imports */[
           if (dart.notNull(i) > 0) {
             sb.write(", ");
           }
-          sb.write(Error.safeToString(this[_arguments][dartx.get](i)));
+          sb.write(exports.Error.safeToString(this[_arguments][dartx.get](i)));
         }
       }
       if (this[_namedArguments] != null) {
@@ -906,12 +912,12 @@ dart_library.library('dart/core', null, /* Imports */[
           }
           sb.write(_symbolToString(key));
           sb.write(": ");
-          sb.write(Error.safeToString(value));
+          sb.write(exports.Error.safeToString(value));
           i = dart.notNull(i) + 1;
-        }, dart.dynamic, [Symbol, dart.dynamic]));
+        }, dart.dynamic, [exports.Symbol, dart.dynamic]));
       }
       if (this[_existingArgumentNames] == null) {
-        return `NoSuchMethodError : method not found: '${this[_memberName]}'\n` + `Receiver: ${Error.safeToString(this[_receiver])}\n` + `Arguments: [${sb}]`;
+        return `NoSuchMethodError : method not found: '${this[_memberName]}'\n` + `Receiver: ${exports.Error.safeToString(this[_receiver])}\n` + `Arguments: [${sb}]`;
       } else {
         let actualParameters = dart.toString(sb);
         sb = new StringBuffer();
@@ -922,14 +928,14 @@ dart_library.library('dart/core', null, /* Imports */[
           sb.write(this[_existingArgumentNames][dartx.get](i));
         }
         let formalParameters = dart.toString(sb);
-        return "NoSuchMethodError: incorrect number of arguments passed to " + `method named '${this[_memberName]}'\n` + `Receiver: ${Error.safeToString(this[_receiver])}\n` + `Tried calling: ${this[_memberName]}(${actualParameters})\n` + `Found: ${this[_memberName]}(${formalParameters})`;
+        return "NoSuchMethodError: incorrect number of arguments passed to " + `method named '${this[_memberName]}'\n` + `Receiver: ${exports.Error.safeToString(this[_receiver])}\n` + `Tried calling: ${this[_memberName]}(${actualParameters})\n` + `Found: ${this[_memberName]}(${formalParameters})`;
       }
     }
   }
   dart.setSignature(NoSuchMethodError, {
-    constructors: () => ({NoSuchMethodError: [NoSuchMethodError, [Object, Symbol, List, Map$(Symbol, dart.dynamic)], [List]]})
+    constructors: () => ({NoSuchMethodError: [NoSuchMethodError, [exports.Object, exports.Symbol, List, Map$(exports.Symbol, dart.dynamic)], [List]]})
   });
-  class UnsupportedError extends Error {
+  class UnsupportedError extends exports.Error {
     UnsupportedError(message) {
       this.message = message;
       super.Error();
@@ -941,7 +947,7 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(UnsupportedError, {
     constructors: () => ({UnsupportedError: [UnsupportedError, [String]]})
   });
-  class UnimplementedError extends Error {
+  class UnimplementedError extends exports.Error {
     UnimplementedError(message) {
       if (message === void 0)
         message = null;
@@ -956,7 +962,7 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(UnimplementedError, {
     constructors: () => ({UnimplementedError: [UnimplementedError, [], [String]]})
   });
-  class StateError extends Error {
+  class StateError extends exports.Error {
     StateError(message) {
       this.message = message;
       super.Error();
@@ -968,7 +974,7 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(StateError, {
     constructors: () => ({StateError: [StateError, [String]]})
   });
-  class ConcurrentModificationError extends Error {
+  class ConcurrentModificationError extends exports.Error {
     ConcurrentModificationError(modifiedObject) {
       if (modifiedObject === void 0)
         modifiedObject = null;
@@ -979,13 +985,13 @@ dart_library.library('dart/core', null, /* Imports */[
       if (this.modifiedObject == null) {
         return "Concurrent modification during iteration.";
       }
-      return "Concurrent modification during iteration: " + `${Error.safeToString(this.modifiedObject)}.`;
+      return "Concurrent modification during iteration: " + `${exports.Error.safeToString(this.modifiedObject)}.`;
     }
   }
   dart.setSignature(ConcurrentModificationError, {
-    constructors: () => ({ConcurrentModificationError: [ConcurrentModificationError, [], [Object]]})
+    constructors: () => ({ConcurrentModificationError: [ConcurrentModificationError, [], [exports.Object]]})
   });
-  class OutOfMemoryError extends Object {
+  class OutOfMemoryError extends exports.Object {
     OutOfMemoryError() {
     }
     toString() {
@@ -995,11 +1001,11 @@ dart_library.library('dart/core', null, /* Imports */[
       return null;
     }
   }
-  OutOfMemoryError[dart.implements] = () => [Error];
+  OutOfMemoryError[dart.implements] = () => [exports.Error];
   dart.setSignature(OutOfMemoryError, {
     constructors: () => ({OutOfMemoryError: [OutOfMemoryError, []]})
   });
-  class StackOverflowError extends Object {
+  class StackOverflowError extends exports.Object {
     StackOverflowError() {
     }
     toString() {
@@ -1009,11 +1015,11 @@ dart_library.library('dart/core', null, /* Imports */[
       return null;
     }
   }
-  StackOverflowError[dart.implements] = () => [Error];
+  StackOverflowError[dart.implements] = () => [exports.Error];
   dart.setSignature(StackOverflowError, {
     constructors: () => ({StackOverflowError: [StackOverflowError, []]})
   });
-  class CyclicInitializationError extends Error {
+  class CyclicInitializationError extends exports.Error {
     CyclicInitializationError(variableName) {
       if (variableName === void 0)
         variableName = null;
@@ -1027,7 +1033,7 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(CyclicInitializationError, {
     constructors: () => ({CyclicInitializationError: [CyclicInitializationError, [], [String]]})
   });
-  class Exception extends Object {
+  class Exception extends exports.Object {
     static new(message) {
       if (message === void 0)
         message = null;
@@ -1037,7 +1043,7 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(Exception, {
     constructors: () => ({new: [Exception, [], [dart.dynamic]]})
   });
-  class _ExceptionImplementation extends Object {
+  class _ExceptionImplementation extends exports.Object {
     _ExceptionImplementation(message) {
       if (message === void 0)
         message = null;
@@ -1053,7 +1059,7 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(_ExceptionImplementation, {
     constructors: () => ({_ExceptionImplementation: [_ExceptionImplementation, [], [dart.dynamic]]})
   });
-  class FormatException extends Object {
+  class FormatException extends exports.Object {
     FormatException(message, source, offset) {
       if (message === void 0)
         message = "";
@@ -1145,7 +1151,7 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(FormatException, {
     constructors: () => ({FormatException: [FormatException, [], [String, dart.dynamic, int]]})
   });
-  class IntegerDivisionByZeroException extends Object {
+  class IntegerDivisionByZeroException extends exports.Object {
     IntegerDivisionByZeroException() {
     }
     toString() {
@@ -1156,9 +1162,9 @@ dart_library.library('dart/core', null, /* Imports */[
   dart.setSignature(IntegerDivisionByZeroException, {
     constructors: () => ({IntegerDivisionByZeroException: [IntegerDivisionByZeroException, []]})
   });
-  let _getKey = dart.JsSymbol('_getKey');
+  let _getKey = Symbol('_getKey');
   let Expando$ = dart.generic(function(T) {
-    class Expando extends Object {
+    class Expando extends exports.Object {
       Expando(name) {
         if (name === void 0)
           name = null;
@@ -1175,7 +1181,7 @@ dart_library.library('dart/core', null, /* Imports */[
         dart.as(value, T);
         let values = _js_helper.Primitives.getProperty(object, Expando$()._EXPANDO_PROPERTY_NAME);
         if (values == null) {
-          values = new Object();
+          values = new exports.Object();
           _js_helper.Primitives.setProperty(object, Expando$()._EXPANDO_PROPERTY_NAME, values);
         }
         _js_helper.Primitives.setProperty(values, this[_getKey](), value);
@@ -1197,8 +1203,8 @@ dart_library.library('dart/core', null, /* Imports */[
     dart.setSignature(Expando, {
       constructors: () => ({Expando: [Expando$(T), [], [String]]}),
       methods: () => ({
-        get: [T, [Object]],
-        set: [dart.void, [Object, T]],
+        get: [T, [exports.Object]],
+        set: [dart.void, [exports.Object, T]],
         [_getKey]: [String, []]
       })
     });
@@ -1208,7 +1214,7 @@ dart_library.library('dart/core', null, /* Imports */[
   Expando._KEY_PROPERTY_NAME = 'expando$key';
   Expando._EXPANDO_PROPERTY_NAME = 'expando$values';
   Expando._keyCount = 0;
-  class Function extends Object {
+  class Function extends exports.Object {
     static apply(f, positionalArguments, namedArguments) {
       if (namedArguments === void 0)
         namedArguments = null;
@@ -1217,26 +1223,26 @@ dart_library.library('dart/core', null, /* Imports */[
     static _toMangledNames(namedArguments) {
       let result = dart.map();
       namedArguments.forEach(dart.fn((symbol, value) => {
-        result.set(_symbolToString(dart.as(symbol, Symbol)), value);
+        result.set(_symbolToString(dart.as(symbol, exports.Symbol)), value);
       }));
       return result;
     }
   }
   dart.setSignature(Function, {
     statics: () => ({
-      apply: [dart.dynamic, [Function, List], [Map$(Symbol, dart.dynamic)]],
-      _toMangledNames: [Map$(String, dart.dynamic), [Map$(Symbol, dart.dynamic)]]
+      apply: [dart.dynamic, [Function, List], [Map$(exports.Symbol, dart.dynamic)]],
+      _toMangledNames: [Map$(String, dart.dynamic), [Map$(exports.Symbol, dart.dynamic)]]
     }),
     names: ['apply', '_toMangledNames']
   });
   function identical(a, b) {
     return _js_helper.Primitives.identicalImplementation(a, b);
   }
-  dart.fn(identical, bool, [Object, Object]);
+  dart.fn(identical, bool, [exports.Object, exports.Object]);
   function identityHashCode(object) {
     return _js_helper.objectHashCode(object);
   }
-  dart.fn(identityHashCode, () => dart.definiteFunctionType(int, [Object]));
+  dart.fn(identityHashCode, () => dart.definiteFunctionType(int, [exports.Object]));
   class int extends num {
     static fromEnvironment(name, opts) {
       let defaultValue = opts && 'defaultValue' in opts ? opts.defaultValue : null;
@@ -1253,7 +1259,7 @@ dart_library.library('dart/core', null, /* Imports */[
     statics: () => ({parse: [int, [String], {radix: int, onError: dart.functionType(int, [String])}]}),
     names: ['parse']
   });
-  class Invocation extends Object {
+  class Invocation extends exports.Object {
     get isAccessor() {
       return dart.notNull(this.isGetter) || dart.notNull(this.isSetter);
     }
@@ -1262,7 +1268,7 @@ dart_library.library('dart/core', null, /* Imports */[
     dart.defineExtensionNames([
       'join'
     ]);
-    class Iterable extends Object {
+    class Iterable extends exports.Object {
       Iterable() {
       }
       static generate(count, generator) {
@@ -1272,7 +1278,7 @@ dart_library.library('dart/core', null, /* Imports */[
           return new (_internal.EmptyIterable$(E))();
         return new (exports._GeneratorIterable$(E))(count, generator);
       }
-      [dart.JsSymbol.iterator]() {
+      [Symbol.iterator]() {
         return new dart.JsIterator(this[dartx.iterator]);
       }
       [dartx.join](separator) {
@@ -1298,9 +1304,9 @@ dart_library.library('dart/core', null, /* Imports */[
     return _Generator;
   });
   let _Generator = _Generator$();
-  let _end = dart.JsSymbol('_end');
-  let _start = dart.JsSymbol('_start');
-  let _generator = dart.JsSymbol('_generator');
+  let _end = Symbol('_end');
+  let _start = Symbol('_start');
+  let _generator = Symbol('_generator');
   let _GeneratorIterable$ = dart.generic(function(E) {
     class _GeneratorIterable extends collection.IterableBase$(E) {
       _GeneratorIterable(end, generator) {
@@ -1361,10 +1367,10 @@ dart_library.library('dart/core', null, /* Imports */[
     return _GeneratorIterable;
   });
   dart.defineLazyClassGeneric(exports, '_GeneratorIterable', {get: _GeneratorIterable$});
-  let _index = dart.JsSymbol('_index');
-  let _current = dart.JsSymbol('_current');
+  let _index = Symbol('_index');
+  let _current = Symbol('_current');
   let _GeneratorIterator$ = dart.generic(function(E) {
-    class _GeneratorIterator extends Object {
+    class _GeneratorIterator extends exports.Object {
       _GeneratorIterator(index, end, generator) {
         this[_index] = index;
         this[_end] = end;
@@ -1394,18 +1400,18 @@ dart_library.library('dart/core', null, /* Imports */[
   });
   let _GeneratorIterator = _GeneratorIterator$();
   let BidirectionalIterator$ = dart.generic(function(E) {
-    class BidirectionalIterator extends Object {}
+    class BidirectionalIterator extends exports.Object {}
     BidirectionalIterator[dart.implements] = () => [Iterator$(E)];
     return BidirectionalIterator;
   });
   let BidirectionalIterator = BidirectionalIterator$();
   let Iterator$ = dart.generic(function(E) {
-    class Iterator extends Object {}
+    class Iterator extends exports.Object {}
     return Iterator;
   });
   let Iterator = Iterator$();
   let List$ = dart.generic(function(E) {
-    class List extends Object {
+    class List extends exports.Object {
       static new(length) {
         if (length === void 0)
           length = null;
@@ -1453,7 +1459,7 @@ dart_library.library('dart/core', null, /* Imports */[
         }
         return result;
       }
-      [dart.JsSymbol.iterator]() {
+      [Symbol.iterator]() {
         return new dart.JsIterator(this[dartx.iterator]);
       }
     }
@@ -1470,7 +1476,7 @@ dart_library.library('dart/core', null, /* Imports */[
   });
   let List = List$();
   let Map$ = dart.generic(function(K, V) {
-    class Map extends Object {
+    class Map extends exports.Object {

[ochafik, 2015/09/15 16:58:33]

This one will be seen as a redefine in ES6 as well, I think.

       static new() {
         return collection.LinkedHashMap$(K, V).new();
       }
@@ -1499,7 +1505,7 @@ dart_library.library('dart/core', null, /* Imports */[
     return Map;
   });
   let Map = Map$();
-  class Null extends Object {
+  class Null extends exports.Object {
     static _uninstantiable() {
       dart.throw(new UnsupportedError('class Null cannot be instantiated'));
     }
@@ -1511,7 +1517,7 @@ dart_library.library('dart/core', null, /* Imports */[
     constructors: () => ({_uninstantiable: [Null, []]})
   });
   num._parseError = false;
-  class Pattern extends Object {}
+  class Pattern extends exports.Object {}
   function print(object) {
     let line = `${object}`;
     if (_internal.printToZone == null) {
@@ -1520,9 +1526,9 @@ dart_library.library('dart/core', null, /* Imports */[
       dart.dcall(_internal.printToZone, line);
     }
   }
-  dart.fn(print, dart.void, [Object]);
-  class Match extends Object {}
-  class RegExp extends Object {
+  dart.fn(print, dart.void, [exports.Object]);
+  class Match extends exports.Object {}
+  class RegExp extends exports.Object {
     static new(source, opts) {
       let multiLine = opts && 'multiLine' in opts ? opts.multiLine : false;
       let caseSensitive = opts && 'caseSensitive' in opts ? opts.caseSensitive : true;
@@ -1557,13 +1563,13 @@ dart_library.library('dart/core', null, /* Imports */[
   });
   dart.defineLazyClassGeneric(exports, 'Set', {get: Set$});
   let Sink$ = dart.generic(function(T) {
-    class Sink extends Object {}
+    class Sink extends exports.Object {}
     return Sink;
   });
   let Sink = Sink$();
-  class StackTrace extends Object {}
-  let _stop = dart.JsSymbol('_stop');
-  class Stopwatch extends Object {
+  class StackTrace extends exports.Object {}
+  let _stop = Symbol('_stop');
+  class Stopwatch extends exports.Object {
     get frequency() {
       return Stopwatch._frequency;
     }
@@ -1635,7 +1641,7 @@ dart_library.library('dart/core', null, /* Imports */[
     names: ['_initTicker', '_now']
   });
   Stopwatch._frequency = null;
-  class String extends Object {
+  class String extends exports.Object {
     static fromCharCodes(charCodes, start, end) {
       if (start === void 0)
         start = 0;
@@ -1747,11 +1753,11 @@ dart_library.library('dart/core', null, /* Imports */[
     return 65536 + ((dart.notNull(start) & 1023) << 10) + (dart.notNull(end) & 1023);
   }
   dart.fn(_combineSurrogatePair, int, [int, int]);
-  let _position = dart.JsSymbol('_position');
-  let _nextPosition = dart.JsSymbol('_nextPosition');
-  let _currentCodePoint = dart.JsSymbol('_currentCodePoint');
-  let _checkSplitSurrogate = dart.JsSymbol('_checkSplitSurrogate');
-  class RuneIterator extends Object {
+  let _position = Symbol('_position');
+  let _nextPosition = Symbol('_nextPosition');
+  let _currentCodePoint = Symbol('_currentCodePoint');
+  let _checkSplitSurrogate = Symbol('_checkSplitSurrogate');
+  class RuneIterator extends exports.Object {
     RuneIterator(string) {
       this.string = string;
       this[_position] = 0;
@@ -1855,9 +1861,9 @@ dart_library.library('dart/core', null, /* Imports */[
       movePrevious: [bool, []]
     })
   });
-  let _contents = dart.JsSymbol('_contents');
-  let _writeString = dart.JsSymbol('_writeString');
-  class StringBuffer extends Object {
+  let _contents = Symbol('_contents');
+  let _writeString = Symbol('_writeString');
+  class StringBuffer extends exports.Object {
     StringBuffer(content) {
       if (content === void 0)
         content = "";
@@ -1914,42 +1920,45 @@ dart_library.library('dart/core', null, /* Imports */[
   }
   StringBuffer[dart.implements] = () => [StringSink];
   dart.setSignature(StringBuffer, {
-    constructors: () => ({StringBuffer: [StringBuffer, [], [Object]]}),
+    constructors: () => ({StringBuffer: [StringBuffer, [], [exports.Object]]}),
     methods: () => ({
-      write: [dart.void, [Object]],
+      write: [dart.void, [exports.Object]],
       writeCharCode: [dart.void, [int]],
       writeAll: [dart.void, [Iterable], [String]],
-      writeln: [dart.void, [], [Object]],
+      writeln: [dart.void, [], [exports.Object]],
       clear: [dart.void, []],
       [_writeString]: [dart.void, [dart.dynamic]]
     })
   });
-  class StringSink extends Object {}
-  class Symbol extends Object {
-    static new(name) {
-      return new _internal.Symbol(name);
+  class StringSink extends exports.Object {}
+  exports.Symbol = (() => {
+    class Symbol extends exports.Object {
+      static new(name) {
+        return new _internal.Symbol(name);
+      }
     }
-  }
-  dart.setSignature(Symbol, {
-    constructors: () => ({new: [Symbol, [String]]})
-  });
-  class Type extends Object {}
-  let _writeAuthority = dart.JsSymbol('_writeAuthority');
-  let _userInfo = dart.JsSymbol('_userInfo');
-  let _host = dart.JsSymbol('_host');
-  let _port = dart.JsSymbol('_port');
-  let _path = dart.JsSymbol('_path');
-  let _query = dart.JsSymbol('_query');
-  let _fragment = dart.JsSymbol('_fragment');
-  let _pathSegments = dart.JsSymbol('_pathSegments');
-  let _queryParameters = dart.JsSymbol('_queryParameters');
-  let _merge = dart.JsSymbol('_merge');
-  let _hasDotSegments = dart.JsSymbol('_hasDotSegments');
-  let _removeDotSegments = dart.JsSymbol('_removeDotSegments');
-  let _toWindowsFilePath = dart.JsSymbol('_toWindowsFilePath');
-  let _toFilePath = dart.JsSymbol('_toFilePath');
-  let _isPathAbsolute = dart.JsSymbol('_isPathAbsolute');
-  class Uri extends Object {
+    dart.setSignature(Symbol, {
+      constructors: () => ({new: [exports.Symbol, [String]]})
+    });
+    return Symbol;
+  })();
+  class Type extends exports.Object {}
+  let _writeAuthority = Symbol('_writeAuthority');
+  let _userInfo = Symbol('_userInfo');
+  let _host = Symbol('_host');
+  let _port = Symbol('_port');
+  let _path = Symbol('_path');
+  let _query = Symbol('_query');
+  let _fragment = Symbol('_fragment');
+  let _pathSegments = Symbol('_pathSegments');
+  let _queryParameters = Symbol('_queryParameters');
+  let _merge = Symbol('_merge');
+  let _hasDotSegments = Symbol('_hasDotSegments');
+  let _removeDotSegments = Symbol('_removeDotSegments');
+  let _toWindowsFilePath = Symbol('_toWindowsFilePath');
+  let _toFilePath = Symbol('_toFilePath');
+  let _isPathAbsolute = Symbol('_isPathAbsolute');
+  class Uri extends exports.Object {
     get authority() {
       if (!dart.notNull(this.hasAuthority))
         return "";
@@ -3301,9 +3310,8 @@ dart_library.library('dart/core', null, /* Imports */[
   function _symbolToString(symbol) {
     return _internal.Symbol.getName(dart.as(symbol, _internal.Symbol));
   }
-  dart.fn(_symbolToString, String, [Symbol]);
+  dart.fn(_symbolToString, String, [exports.Symbol]);
   // Exports:
-  exports.Object = Object;
   exports.Deprecated = Deprecated;
   exports.deprecated = deprecated;
   exports.override = override;
@@ -3317,7 +3325,6 @@ dart_library.library('dart/core', null, /* Imports */[
   exports.num = num;
   exports.double = double;
   exports.Duration = Duration;
-  exports.Error = Error;
   exports.AssertionError = AssertionError;
   exports.TypeError = TypeError;
   exports.CastError = CastError;
@@ -3369,7 +3376,6 @@ dart_library.library('dart/core', null, /* Imports */[
   exports.RuneIterator = RuneIterator;
   exports.StringBuffer = StringBuffer;
   exports.StringSink = StringSink;
-  exports.Symbol = Symbol;
   exports.Type = Type;
   exports.Uri = Uri;
 });