Using SubtypeTestCache object instead of an array, that way we do not need to patch and can communi…

runtime/vm/code_generator.h

 // 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.
 
 #ifndef VM_CODE_GENERATOR_H_
 #define VM_CODE_GENERATOR_H_
 
 #include "vm/globals.h"
 #include "vm/runtime_entry.h"
 
@@ skipping 107 matching lines @@
   static void EnterFunctionAt(int i,
                               const Array& cache,
                               const Function& function,
                               int num_arguments,
                               int num_named_arguments);
 
   const Class& class_;
 };
 
 
-// A subtype test cache is an array remembering subtype tests for given values.
-class SubTypeTestCache : public AllStatic {
- public:
-  enum Entries {
-    kInstanceClass = 0,
-    kInstanceTypeArguments = 1,
-    kInstantiatorTypeArguments = 2,
-    kTestResult = 3,
-    kNumEntries  = 4,
-  };
-};
-
-
 RawCode* ResolveCompileInstanceCallTarget(Isolate* isolate,
                                           const Instance& receiver);
 
 }  // namespace dart
 
 #endif  // VM_CODE_GENERATOR_H_