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

lib/compiler/implementation/tree/nodes.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.
 
 abstract class Visitor<R> {
   const Visitor();
 
   abstract R visitNode(Node node);
 
   R visitBlock(Block node) => visitStatement(node);
@@ skipping 338 matching lines @@
       Send selectorSend = selector;
       if (selectorSend.receiver is TypeAnnotation) {
         return selectorSend.receiver;
       }
     }
     return null;
   }
 }
 
 class Postfix extends NodeList {
-  Postfix() : super(nodes: const EmptyLink<Node>());
+  Postfix() : super(null, const EmptyLink<Node>());
   Postfix.singleton(Node argument) : super.singleton(argument);
 }
 
 class Prefix extends NodeList {
-  Prefix() : super(nodes: const EmptyLink<Node>());
+  Prefix() : super(null, const EmptyLink<Node>());
   Prefix.singleton(Node argument) : super.singleton(argument);
 }
 
 class SendSet extends Send {
   final Operator assignmentOperator;
   SendSet(receiver, selector, this.assignmentOperator, argumentsNode)
     : super(receiver, selector, argumentsNode);
   SendSet.postfix(receiver,
                   selector,
                   this.assignmentOperator,
@@ skipping 421 matching lines @@
     MULTILINE_SQ,
     RAW_MULTILINE_SQ,
     MULTILINE_NL_SQ,
     RAW_MULTILINE_NL_SQ,
     MULTILINE_NL2_SQ,
     RAW_MULTILINE_NL2_SQ
   ];
   final bool raw;
   final int leftQuoteCharCount;
   final int quote;
-  const StringQuoting(this.quote, [bool raw, int leftQuoteLength])
+  const StringQuoting(this.quote, {bool raw, int leftQuoteLength})
       : this.raw = raw, this.leftQuoteCharCount = leftQuoteLength;
   String get quoteChar => quote === $DQ ? '"' : "'";
 
   int get leftQuoteLength => (raw ? 1 : 0) + leftQuoteCharCount;
   int get rightQuoteLength => (leftQuoteCharCount > 2) ? 3 : 1;
   static StringQuoting getQuoting(int quote, bool raw, int quoteLength) {
     int index = quoteLength - 1;
     if (quoteLength > 2) index -= 1;
     return mapping[(raw ? 1 : 0) + index * 2 + (quote === $SQ ? 8 : 0)];
   }
@@ skipping 1199 matching lines @@
  * argument).
  *
  * TODO(ahe): This method is controversial, the team needs to discuss
  * if top-level methods are acceptable and what naming conventions to
  * use.
  */
 initializerDo(Node node, f(Node node)) {
   SendSet send = node.asSendSet();
   if (send !== null) return f(send.arguments.head);
 }