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

pkg/dartdoc/lib/dartdoc.dart

Index: pkg/dartdoc/lib/dartdoc.dart
===================================================================
--- pkg/dartdoc/lib/dartdoc.dart	(revision 13588)
+++ pkg/dartdoc/lib/dartdoc.dart	(working copy)
@@ -1205,7 +1205,7 @@
    * is `true` (and [includeSource] is set), also includes the source code.
    */
   void docCode(ObjectMirror host, Location location, DocComment comment,
-               [bool showCode = false]) {
+               {bool showCode: false}) {
     writeln('<div class="doc">');
     if (comment != null) {
       if (comment.inheritedFrom !== null) {
@@ -1427,7 +1427,7 @@
   }
 
   /** Generates a human-friendly string representation for a type. */
-  typeName(TypeMirror type, [bool showBounds = false]) {
+  typeName(TypeMirror type, {bool showBounds: false}) {
     if (type.isVoid) {
       return 'void';
     }
@@ -1498,9 +1498,9 @@
    * style it appropriately.
    */
   md.Node resolveNameReference(String name,
-                               [MemberMirror currentMember = null,
-                                ObjectMirror currentType = null,
-                                LibraryMirror currentLibrary = null]) {
+                               {MemberMirror currentMember: null,

[Jennifer Messerly, 2012/10/12 02:35:58]

do we need the null here?

[Lasse Reichstein Nielsen, 2012/10/12 07:52:19]

No (and we didn't before either).
I'm usually all for giving redundant information if it improves readability, but
here I'd omit the nulls too.

[regis, 2012/10/12 17:51:51]

Lasse is correct, nulls are redundant. This cl does not try to address stylistic
issues, but since you explicitly point to these, I removed the nulls here. There
are many other instances of redundant nulls, though.   

+                                ObjectMirror currentType: null,
+                                LibraryMirror currentLibrary: null}) {
     makeLink(String href) {
       final anchor = new md.Element.text('a', name);
       anchor.attributes['href'] = relativePath(href);