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

runtime/lib/internal_patch.dart

Index: runtime/lib/internal_patch.dart
diff --git a/runtime/lib/internal_patch.dart b/runtime/lib/internal_patch.dart
index d19430feade0b2fddd3dae8b2e611cb303a7c7e9..88bff92c4803143f6e19e35290a1ab2ac5c05604 100644
--- a/runtime/lib/internal_patch.dart
+++ b/runtime/lib/internal_patch.dart
@@ -35,3 +35,11 @@ class VMLibraryHooks {
 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;
+}