Check that interface constructors and default class constructors are compatible.

compiler/lib/implementation/date_implementation.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Dart core library.
 
 // JavaScript implementation of DateImplementation.
 class DateImplementation implements Date {
   factory DateImplementation(int years,
                              int month,
                              int day,
                              int hours,
                              int minutes,
                              int seconds,
                              int milliseconds) {
     return new DateImplementation.withTimeZone(
         years, month, day,
         hours, minutes, seconds, milliseconds,
         new TimeZoneImplementation.local());
   }
 
   DateImplementation.withTimeZone(int years,
                                   int month,
                                   int day,
                                   int hours,
                                   int minutes,
                                   int seconds,
                                   int milliseconds,
-                                  TimeZoneImplementation timeZone)
+                                  TimeZone timeZone)
       : this.timeZone = timeZone,
         value = _valueFromDecomposed(years, month, day,
                                      hours, minutes, seconds, milliseconds,
                                      timeZone.isUtc) {
   }
 
   DateImplementation.now()
       : timeZone = new TimeZone.local(),
         value = _now() {
   }
 
   DateImplementation.fromString(String formattedString)
       : timeZone = new TimeZone.local(),
         value = _valueFromString(formattedString) {
   }
 
-  const DateImplementation.fromEpoch(this.value, this.timeZone);
+  const DateImplementation.fromEpoch(int this.value, TimeZone this.timeZone);
 
   bool operator ==(other) {
     if (!(other is DateImplementation)) return false;
     return (value == other.value) && (timeZone == other.timeZone);
   }
 
   int compareTo(Date other) {
     return value.compareTo(other.value);
   }
 
@@ skipping 104 matching lines @@
   static int _valueFromString(String str) native;
   static int _now() native;
   int _getYear(int value, bool isUtc) native;
   int _getMonth(int value, bool isUtc) native;
   int _getDay(int value, bool isUtc) native;
   int _getHours(int value, bool isUtc) native;
   int _getMinutes(int value, bool isUtc) native;
   int _getSeconds(int value, bool isUtc) native;
   int _getMilliseconds(int value, bool isUtc) native;
 }