Remove LastAdded from the EnumCacheBridge.

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2555 matching lines @@
 
   // Constant for denoting key was not found.
   static const int kNotFound = -1;
 
   static const int kBackPointerStorageIndex = 0;
   static const int kEnumCacheIndex = 1;
   static const int kTransitionsIndex = 2;
   static const int kFirstIndex = 3;
 
   // The length of the "bridge" to the enum cache.
-  static const int kEnumCacheBridgeLength = 3;
-  static const int kEnumCacheBridgeLastAdded = 0;
-  static const int kEnumCacheBridgeCacheIndex = 1;
-  static const int kEnumCacheBridgeIndicesCacheIndex = 2;
+  static const int kEnumCacheBridgeLength = 2;
+  static const int kEnumCacheBridgeCacheIndex = 0;
+  static const int kEnumCacheBridgeIndicesCacheIndex = 1;
 
   // Layout description.
   static const int kBackPointerStorageOffset = FixedArray::kHeaderSize;
   static const int kEnumCacheOffset = kBackPointerStorageOffset +
                                       kPointerSize;
   static const int kTransitionsOffset = kEnumCacheOffset + kPointerSize;
   static const int kFirstOffset = kTransitionsOffset + kPointerSize;
 
   // Layout description for the bridge array.
-  static const int kEnumCacheBridgeLastAddedOffset = FixedArray::kHeaderSize;
-  static const int kEnumCacheBridgeCacheOffset =
-    kEnumCacheBridgeLastAddedOffset + kPointerSize;
+  static const int kEnumCacheBridgeCacheOffset = FixedArray::kHeaderSize;
 
   // Layout of descriptor.
   static const int kDescriptorKey = 0;
   static const int kDescriptorDetails = 1;
   static const int kDescriptorValue = 2;
   static const int kDescriptorSize = 3;
 
 #ifdef OBJECT_PRINT
   // Print all the descriptors.
   inline void PrintDescriptors() {
@@ skipping 6274 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_