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

lib/compiler/implementation/lib/coreimpl_patch.dart

Index: lib/compiler/implementation/lib/coreimpl_patch.dart
===================================================================
--- lib/compiler/implementation/lib/coreimpl_patch.dart	(revision 13683)
+++ lib/compiler/implementation/lib/coreimpl_patch.dart	(working copy)
@@ -74,13 +74,13 @@
 // 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) {