Fix checking of generated directory contents.

pkg/analysis_server/tool/spec/codegen_tools.dart

 // Copyright (c) 2014, 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.
 
 /**
  * Tools for code generation.
  */
 library codegen.tools;
 
 import 'dart:io';
@@ skipping 193 matching lines @@
       new Directory(joinAll(posix.split(outputDirPath)));
 
   /**
    * Check whether the directory has the correct contents, and return true if it
    * does.
    */
   @override
   bool check() {
     Map<String, FileContentsComputer> map = directoryContentsComputer();
     try {
-      map.forEach((String file, FileContentsComputer fileContentsComputer) {
+      for (String file in map.keys) {
+        FileContentsComputer fileContentsComputer = map[file];
         String expectedContents = fileContentsComputer();
         File outputFile =
             new File(joinAll(posix.split(posix.join(outputDirPath, file))));
         if (expectedContents != outputFile.readAsStringSync()) {
           return false;
         }
-      });
+      }
       int nonHiddenFileCount = 0;
       outputFile.listSync(
           recursive: false,
           followLinks: false).forEach((FileSystemEntity fileSystemEntity) {
         if (fileSystemEntity is File &&
             !basename(fileSystemEntity.path).startsWith('.')) {
           nonHiddenFileCount++;
         }
       });
       if (nonHiddenFileCount != map.length) {
@@ skipping 220 matching lines @@
     if (lines.last.isEmpty) {
       lines.removeLast();
       buffer.add(new dom.Text(lines.join('\n$indent') + '\n'));
       indentNeeded = true;
     } else {
       buffer.add(new dom.Text(lines.join('\n$indent')));
       indentNeeded = false;
     }
   }
 }