Patches to support Dart VM patch files in dart2js.

runtime/lib/internal_patch.dart

 // Copyright (c) 2013, 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.
 
 patch List makeListFixedLength(List growableList)
     native "Internal_makeListFixedLength";
 
 patch List makeFixedListUnmodifiable(List fixedLengthList)
     native "Internal_makeFixedListUnmodifiable";
 
-class VMLibraryHooks {
-  // Example: "dart:isolate _Timer._factory"
-  static var timerFactory;
-
-  // Example: "dart:io _EventHandler._sendData"
-  static var eventHandlerSendData;
-
-  // A nullary closure that answers the current clock value in milliseconds.
-  // Example: "dart:io _EventHandler._timerMillisecondClock"
-  static var timerMillisecondClock;
-
-  // Implementation of Resource.readAsBytes.
-  static var resourceReadAsBytes;
-
-  // Implementation of package root/map provision.
-  static var packageRootString;
-  static var packageConfigString;
-  static var packageRootUriFuture;
-  static var packageConfigUriFuture;
-  static var resolvePackageUriFuture;
-
-  static var platformScript;
-}
-
-patch class CodeUnits {
-  static final int cid = ClassID.getID(new CodeUnits(""));
-}
-
-final bool is64Bit = _inquireIs64Bit();
-
 bool _inquireIs64Bit() native "Internal_inquireIs64Bit";