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

pkg/dartdoc/lib/dartdoc.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.
 
 /**
  * To generate docs for a library, run this script with the path to an
  * entrypoint .dart file, like:
  *
  *     $ dart dartdoc.dart foo.dart
  *
@@ skipping 1587 matching lines @@
   }
 
   /** Creates a linked cross reference to [type]. */
   typeReference(InterfaceMirror type) {
     // TODO(rnystrom): Do we need to handle ParameterTypes here like
     // annotation() does?
     return a(typeUrl(type), typeName(type), css: 'crossref');
   }
 
   /** 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';
     }
     if (type is TypeVariableMirror) {
       return type.simpleName;
     }
     assert(type is InterfaceMirror);
 
     // See if it's a generic type.
     if (type.isDeclaration) {
@@ skipping 50 matching lines @@
     // Syntax highlight.
     return classifySource(code);
   }
 
   /**
    * This will be called whenever a doc comment hits a `[name]` in square
    * brackets. It will try to figure out what the name refers to and link or
    * style it appropriately.
    */
   md.Node resolveNameReference(String name,
-                               [MemberMirror currentMember = null,
-                                ObjectMirror currentType = null,
-                                LibraryMirror currentLibrary = null]) {
+                               {MemberMirror currentMember,
+                                ObjectMirror currentType,
+                                LibraryMirror currentLibrary}) {
     makeLink(String href) {
       final anchor = new md.Element.text('a', name);
       anchor.attributes['href'] = relativePath(href);
       anchor.attributes['class'] = 'crossref';
       return anchor;
     }
 
     // See if it's a parameter of the current method.
     if (currentMember is MethodMirror) {
       for (final parameter in currentMember.parameters) {
@@ skipping 125 matching lines @@
   final InterfaceMirror inheritedFrom;
 
   DocComment(this.text, [this.inheritedFrom = null]) {
     assert(text != null && !text.trim().isEmpty());
   }
 
   String get html => md.markdownToHtml(text);
 
   String toString() => text;
 }