Revert keyed load cache probing in generated code....

src/heap.h

Index: src/heap.h
===================================================================
--- src/heap.h	(revision 3445)
+++ src/heap.h	(working copy)
@@ -1300,35 +1300,19 @@
 
   // Clear the cache.
   static void Clear();
-
-  static const int kLength = 64;
-  static const int kCapacityMask = kLength - 1;
-  static const int kMapHashShift = 2;
-
  private:
   static inline int Hash(Map* map, String* name);
-
-  // Get the address of the keys and field_offsets arrays.  Used in
-  // generated code to perform cache lookups.
-  static Address keys_address() {
-    return reinterpret_cast<Address>(&keys_);
-  }
-
-  static Address field_offsets_address() {
-    return reinterpret_cast<Address>(&field_offsets_);
-  }
-
+  static const int kLength = 64;
   struct Key {
     Map* map;
     String* name;
   };
   static Key keys_[kLength];
   static int field_offsets_[kLength];
-
-  friend class ExternalReference;
 };
 
 
+
 // Cache for mapping (array, property name) into descriptor index.
 // The cache contains both positive and negative results.
 // Descriptor index equals kNotFound means the property is absent.