Move selector and arguments descriptor into MegamorphicCache.

runtime/vm/megamorphic_cache_table.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_MEGAMORPHIC_CACHE_TABLE_H_
 #define VM_MEGAMORPHIC_CACHE_TABLE_H_
 
 #include "vm/allocation.h"
 
 namespace dart {
@@ skipping 12 matching lines @@
 class MegamorphicCacheTable : public AllStatic {
  public:
   static RawFunction* miss_handler(Isolate* isolate);
   static void InitMissHandler(Isolate* isolate);
 
   static RawMegamorphicCache* Lookup(Isolate* isolate,
                                      const String& name,
                                      const Array& descriptor);
 
   static void PrintSizes(Isolate* isolate);
-
- private:
-  enum {
-    kEntryNameOffset = 0,
-    kEntryDescriptorOffset,
-    kEntryCacheOffset,
-    kEntrySize
-  };
 };
 
 }  // namespace dart
 
 #endif  // VM_MEGAMORPHIC_CACHE_TABLE_H_