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

tests/compiler/dart2js/parser_helper.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.
 
 #library('parser_helper');
 
 #import("dart:uri");
 
 #import("../../../lib/compiler/implementation/elements/elements.dart");
 #import("../../../lib/compiler/implementation/tree/tree.dart");
 #import('../../../lib/compiler/implementation/scanner/scannerlib.dart');
 #import("../../../lib/compiler/implementation/leg.dart");
 #import("../../../lib/compiler/implementation/source_file.dart");
 #import("../../../lib/compiler/implementation/util/util.dart");
 
 class LoggerCanceler implements DiagnosticListener {
-  void cancel([String reason, node, token, instruction, element]) {
+  void cancel(String reason, {node, token, instruction, element}) {
     throw new CompilerCancelledException(reason);
   }
 
   void log(message) {
     print(message);
   }
 }
 
 Token scan(String text) => new StringScanner(text).tokenize();
 
@@ skipping 50 matching lines @@
 NodeList fullParseUnit(String source) {
   return parseBodyCode(source, (parser, tokens) => parser.parseUnit(tokens));
 }
 
 // TODO(ahe): We define this method to avoid having to import
 // the scanner in the tests. We should move SourceString to another
 // location instead.
 SourceString buildSourceString(String name) {
   return new SourceString(name);
 }