simplify constructors, fixes #564

test/codegen/expect/expect/expect.js

 dart_library.library('expect', null, /* Imports */[
   'dart_sdk'
 ], function(exports, dart_sdk) {
   'use strict';
   const core = dart_sdk.core;
   const dart = dart_sdk.dart;
   const dartx = dart_sdk.dartx;
   const expect = Object.create(null);
   expect.Expect = class Expect extends core.Object {
     static _truncateString(string, start, end, length) {
@@ skipping 248 matching lines @@
     }),
     names: ['_truncateString', '_stringDifference', 'equals', 'isTrue', 'isFalse', 'isNull', 'isNotNull', 'identical', 'fail', 'approxEquals', 'notEquals', 'listEquals', 'mapEquals', 'stringEquals', 'setEquals', 'throws', '_getMessage', '_fail']
   });
   expect._identical = function(a, b) {
     return core.identical(a, b);
   };
   dart.fn(expect._identical, core.bool, [dart.dynamic, dart.dynamic]);
   expect._CheckExceptionFn = dart.typedef('_CheckExceptionFn', () => dart.functionType(core.bool, [dart.dynamic]));
   expect._Nullary = dart.typedef('_Nullary', () => dart.functionType(dart.dynamic, []));
   expect.ExpectException = class ExpectException extends core.Object {
-    ExpectException(message) {
+    new(message) {
       this.message = message;
     }
     toString() {
       return this.message;
     }
   };
   expect.ExpectException[dart.implements] = () => [core.Exception];
   dart.setSignature(expect.ExpectException, {
-    constructors: () => ({ExpectException: [expect.ExpectException, [core.String]]})
+    constructors: () => ({new: [expect.ExpectException, [core.String]]})
   });
   expect.NoInline = class NoInline extends core.Object {
-    NoInline() {
+    new() {
     }
   };
   dart.setSignature(expect.NoInline, {
-    constructors: () => ({NoInline: [expect.NoInline, []]})
+    constructors: () => ({new: [expect.NoInline, []]})
   });
   expect.TrustTypeAnnotations = class TrustTypeAnnotations extends core.Object {
-    TrustTypeAnnotations() {
+    new() {
     }
   };
   dart.setSignature(expect.TrustTypeAnnotations, {
-    constructors: () => ({TrustTypeAnnotations: [expect.TrustTypeAnnotations, []]})
+    constructors: () => ({new: [expect.TrustTypeAnnotations, []]})
   });
   expect.AssumeDynamic = class AssumeDynamic extends core.Object {
-    AssumeDynamic() {
+    new() {
     }
   };
   dart.setSignature(expect.AssumeDynamic, {
-    constructors: () => ({AssumeDynamic: [expect.AssumeDynamic, []]})
+    constructors: () => ({new: [expect.AssumeDynamic, []]})
   });
   // Exports:
   exports.expect = expect;
 });