fixes #217, Object members on extension types

lib/runtime/dart/_interceptors.js

 dart.library('dart/_interceptors', null, /* Imports */[
   'dart/core',
   'dart/_internal',
   'dart/collection',
   'dart/math'
 ], /* Lazy imports */[
   'dart/_js_helper'
 ], function(exports, core, _internal, collection, math, _js_helper) {
   'use strict';
   let JSArray$ = dart.generic(function(E) {
@@ skipping 322 matching lines @@
             return true;
         }
         return false;
       }
       get [dartx.isEmpty]() {
         return this[dartx.length] == 0;
       }
       get [dartx.isNotEmpty]() {
         return !dart.notNull(this[dartx.isEmpty]);
       }
-      [dartx.toString]() {
+      toString() {
         return collection.ListBase.listToString(this);
       }
       [dartx.toList](opts) {
         let growable = opts && 'growable' in opts ? opts.growable : true;
         let list = this.slice();
         if (!dart.notNull(growable))
           JSArray$().markFixedList(dart.as(list, core.List));
         return JSArray$(E).typed(list);
       }
       [dartx.toSet]() {
         return core.Set$(E).from(this);
       }
       get [dartx.iterator]() {
         return new (_internal.ListIterator$(E))(this);
       }
-      get [dartx.hashCode]() {
+      get hashCode() {
         return _js_helper.Primitives.objectHashCode(this);
       }
       get [dartx.length]() {
         return dart.as(this.length, core.int);
       }
       set [dartx.length](newLength) {
         if (!(typeof newLength == 'number'))
           throw new core.ArgumentError(newLength);
         if (dart.notNull(newLength) < 0)
           throw new core.RangeError.value(newLength);
@@ skipping 323 matching lines @@
         throw new core.UnsupportedError(`Unexpected toString result: ${result}`);
       }
       result = dart.dindex(match, 1);
       let exponent = +dart.dindex(match, 3);
       if (dart.dindex(match, 2) != null) {
         result = result + dart.dindex(match, 2);
         exponent = dart.notNull(exponent) - dart.dindex(match, 2).length;
       }
       return dart.notNull(result) + "0"[dartx['*']](exponent);
     }
-    [dartx.toString]() {
+    toString() {
       if (dart.equals(this, 0) && 1 / this < 0) {
         return '-0.0';
       } else {
         return "" + this;
       }
     }
-    get [dartx.hashCode]() {
+    get hashCode() {
       return this & 0x1FFFFFFF;
     }
     [dartx['unary-']]() {
       return -this;
     }
     [dartx['+']](other) {
       if (!dart.is(other, core.num))
         throw new core.ArgumentError(other);
       return this + other;
     }
@@ skipping 104 matching lines @@
     [dartx['<=']](other) {
       if (!dart.is(other, core.num))
         throw new core.ArgumentError(other);
       return this <= other;
     }
     [dartx['>=']](other) {
       if (!dart.is(other, core.num))
         throw new core.ArgumentError(other);
       return this >= other;
     }
-    get [dartx.runtimeType]() {
+    get runtimeType() {
       return core.num;
     }
   }
   JSNumber[dart.implements] = () => [core.num];
   dart.setSignature(JSNumber, {
     constructors: () => ({JSNumber: [JSNumber, []]}),
     methods: () => ({
       [dartx.compareTo]: [core.int, [core.num]],
       [dartx.remainder]: [core.num, [core.num]],
       [dartx.abs]: [core.num, []],
@@ skipping 93 matching lines @@
       return a | b;
     }
     static _spread(i) {
       i = JSInt._ors(i, JSInt._shrs(i, 1));
       i = JSInt._ors(i, JSInt._shrs(i, 2));
       i = JSInt._ors(i, JSInt._shrs(i, 4));
       i = JSInt._ors(i, JSInt._shrs(i, 8));
       i = JSInt._shru(JSInt._ors(i, JSInt._shrs(i, 16)), 0);
       return i;
     }
-    get [dartx.runtimeType]() {
+    get runtimeType() {
       return core.int;
     }
     [dartx['~']]() {
       return dart.as(~this >>> 0, core.int);
     }
   }
   JSInt[dart.implements] = () => [core.int, core.double];
   dart.setSignature(JSInt, {
     constructors: () => ({JSInt: [JSInt, []]}),
     methods: () => ({
@@ skipping 12 matching lines @@
   });
   JSInt[dart.metadata] = () => [dart.const(new _js_helper.JsPeerInterface({name: 'Number'}))];
   dart.registerExtension(dart.global.Number, JSInt);
   dart.defineExtensionNames([
     'runtimeType'
   ]);
   class JSDouble extends JSNumber {
     JSDouble() {
       super.JSNumber();
     }
-    get [dartx.runtimeType]() {
+    get runtimeType() {
       return core.double;
     }
   }
   JSDouble[dart.implements] = () => [core.double];
   dart.setSignature(JSDouble, {
     constructors: () => ({JSDouble: [JSDouble, []]})
   });
   class JSPositiveInt extends JSInt {
     JSPositiveInt() {
       super.JSInt();
@@ skipping 419 matching lines @@
       return this[dartx.length] == 0;
     }
     get [dartx.isNotEmpty]() {
       return !dart.notNull(this[dartx.isEmpty]);
     }
     [dartx.compareTo](other) {
       if (!(typeof other == 'string'))
         throw new core.ArgumentError(other);
       return dart.equals(this, other) ? 0 : this < other ? -1 : 1;
     }
-    [dartx.toString]() {
+    toString() {
       return this;
     }
-    get [dartx.hashCode]() {
+    get hashCode() {
       let hash = 0;
       for (let i = 0; dart.notNull(i) < dart.notNull(this[dartx.length]); i = dart.notNull(i) + 1) {
         hash = 536870911 & dart.notNull(hash) + this.charCodeAt(i);
         hash = 536870911 & dart.notNull(hash) + ((524287 & dart.notNull(hash)) << 10);
         hash = hash ^ hash >> 6;
       }
       hash = 536870911 & dart.notNull(hash) + ((67108863 & dart.notNull(hash)) << 3);
       hash = hash ^ hash >> 11;
       return 536870911 & dart.notNull(hash) + ((16383 & dart.notNull(hash)) << 15);
     }
-    get [dartx.runtimeType]() {
+    get runtimeType() {
       return core.String;
     }
     get [dartx.length]() {
       return this.length;
     }
     [dartx.get](index) {
       if (!(typeof index == 'number'))
         throw new core.ArgumentError(index);
       if (dart.notNull(index) >= dart.notNull(this[dartx.length]) || dart.notNull(index) < 0)
         throw new core.RangeError.value(index);
@@ skipping 63 matching lines @@
   dart.fn(getInterceptor);
   dart.defineExtensionNames([
     'toString',
     'hashCode',
     'runtimeType'
   ]);
   class JSBool extends Interceptor {
     JSBool() {
       super.Interceptor();
     }
-    [dartx.toString]() {
+    toString() {
       return String(this);
     }
-    get [dartx.hashCode]() {
+    get hashCode() {
       return this ? 2 * 3 * 23 * 3761 : 269 * 811;
     }
-    get [dartx.runtimeType]() {
+    get runtimeType() {
       return core.bool;
     }
   }
   JSBool[dart.implements] = () => [core.bool];
   dart.setSignature(JSBool, {
     constructors: () => ({JSBool: [JSBool, []]})
   });
   JSBool[dart.metadata] = () => [dart.const(new _js_helper.JsPeerInterface({name: 'Boolean'}))];
   dart.registerExtension(dart.global.Boolean, JSBool);
   class JSIndexable extends core.Object {}
@@ skipping 52 matching lines @@
   exports.JSString = JSString;
   exports.getInterceptor = getInterceptor;
   exports.JSBool = JSBool;
   exports.JSIndexable = JSIndexable;
   exports.JSMutableIndexable = JSMutableIndexable;
   exports.JSObject = JSObject;
   exports.JavaScriptObject = JavaScriptObject;
   exports.PlainJavaScriptObject = PlainJavaScriptObject;
   exports.UnknownJavaScriptObject = UnknownJavaScriptObject;
 });