Change core lib, dart2js, and more for new optional parameters syntax

lib/compiler/implementation/lib/coreimpl_patch.dart

 // Copyright (c) 2012, 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.
 
 // Patch file for dart:coreimpl classes.
 
 // Patch for String implementation.
 // TODO(ager): Split out into date_patch.dart and allow #source
 // in patch files?
 patch class StringImplementation {
@@ skipping 56 matching lines @@
     return result;
   }
 }
 
 
 // Patch for Date implementation.
 // TODO(ager): Split out into date_patch.dart and allow #source
 // in patch files?
 patch class DateImplementation {
   patch DateImplementation(int year,
-                           [int month = 1,
-                            int day = 1,
-                            int hour = 0,
-                            int minute = 0,
-                            int second = 0,
-                            int millisecond = 0,
-                            bool isUtc = false])
+                           int month,
+                           int day,
+                           int hour,
+                           int minute,
+                           int second,
+                           int millisecond,
+                           bool isUtc)
       : this.isUtc = checkNull(isUtc),
         millisecondsSinceEpoch = Primitives.valueFromDecomposedDate(
             year, month, day, hour, minute, second, millisecond, isUtc) {
     Primitives.lazyAsJsDate(this);
   }
 
   patch DateImplementation.now()
       : isUtc = false,
         millisecondsSinceEpoch = Primitives.dateNow() {
     Primitives.lazyAsJsDate(this);
@@ skipping 163 matching lines @@
     // hidden global flag.
     _next = _re.firstMatch(_str);
     if (_next == null) {
       _done = true;
       return false;
     } else {
       return true;
     }
   }
 }