Remove Futures class, move methods to Future.

tools/testing/dart/multitest.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 multitest;
 
 import "dart:async";
 import "dart:io";
 import "test_suite.dart";
 
@@ skipping 198 matching lines @@
     Path importDir = importPath.directoryPath;
     if (!importDir.isEmpty) {
       TestUtils.mkdirRecursive(targetDir, importDir);
     }
     // Copy file.
     futureCopies.add(TestUtils.copyFile(sourceDir.join(importPath),
                                         targetDir.join(importPath)));
   }
 
   // Wait until all imports are copied before scheduling test cases.
-  return Futures.wait(futureCopies).then((_) {
+  return Future.wait(futureCopies).then((_) {
     String baseFilename = filePath.filenameWithoutExtension;
     for (String key in tests.keys) {
       final Path multitestFilename =
           targetDir.append('${baseFilename}_$key.dart');
       final File file = new File.fromPath(multitestFilename);
 
       file.createSync();
       RandomAccessFile openedFile = file.openSync(FileMode.WRITE);
       var bytes = tests[key].charCodes;
       openedFile.writeListSync(bytes, 0, bytes.length);
@@ skipping 31 matching lines @@
     // TestSuite.forDirectory.
     split.removeLast();
   }
   String path = '${generatedTestDir.path}/${split.last}';
   Directory dir = new Directory(path);
   if (!dir.existsSync()) {
     dir.createSync();
   }
   return new Path.fromNative(new File(path).fullPathSync());
 }