Introduce a VM-only dart:scalarlist library for byte arrays.

tests/standalone/io/http_parser_test.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.
 
 #import('dart:math');
+#import('dart:scalarlist');
 
 #source("../../../runtime/bin/http_parser.dart");
 
 class HttpParserTest {
   static void runAllTests() {
     testParseRequest();
     testParseResponse();
     testParseInvalidRequest();
     testParseInvalidResponse();
   }
@@ skipping 820 matching lines @@
 0123456789012345678901234567890\r
 0\r\n\r\n""";
     _testParseInvalidResponse(response);
   }
 }
 
 
 void main() {
   HttpParserTest.runAllTests();
 }