AOT: Use a cid range check when possible to implement type tests.

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";
 
@@ skipping 17 matching lines @@
   static var packageRootUriFuture;
   static var packageConfigUriFuture;
   static var resolvePackageUriFuture;
 
   static var platformScript;
 }
 
 final bool is64Bit = _inquireIs64Bit();
 
 bool _inquireIs64Bit() native "Internal_inquireIs64Bit";
+
+bool _classRangeCheck(int cid, int lowerLimit, int upperLimit) {
+  return cid >= lowerLimit && cid <= upperLimit;
+}
+
+bool _classRangeCheckNegative(int cid, int lowerLimit, int upperLimit) {
+  return cid < lowerLimit || cid > upperLimit;
+}