Move json, uri, utf and crypto libraries into the VM.

runtime/bin/utf_sources.gypi

-# 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.
-
-# This file contains all sources for the dart:utf library.
-#
-# TODO(ager): ../lib/utf/utf_vm.dart should be removed when the
-# VM can use the #source directive for libraries.  At that point
-# ../../sdk/lib/utf/utf.dart should be the only utf library file.
-{
-  'sources': [
-    # The utf_vm.dart file needs to be the first source file. It contains
-    # the library and import directives for the dart:utf library. The
-    # dart:utf library is created by concatenating the files listed here
-    # in the order they are listed.
-    '../lib/utf/utf_vm.dart',
-
-    '../../sdk/lib/utf/utf_core.dart',
-    '../../sdk/lib/utf/utf_stream.dart',
-    '../../sdk/lib/utf/utf8.dart',
-    '../../sdk/lib/utf/utf16.dart',
-    '../../sdk/lib/utf/utf32.dart',
-  ],
-}