Use handle lists instead of raw pointer lists in polymorphic code cache.

src/objects.h

 // Copyright 2011 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 5850 matching lines @@
 
 class PolymorphicCodeCache: public Struct {
  public:
   DECL_ACCESSORS(cache, Object)
 
   static void Update(Handle<PolymorphicCodeCache> cache,
                      MapHandleList* maps,
                      Code::Flags flags,
                      Handle<Code> code);
 
-  MUST_USE_RESULT MaybeObject* Update(MapList* maps,
+  MUST_USE_RESULT MaybeObject* Update(MapHandleList* maps,
                                       Code::Flags flags,
                                       Code* code);
 
   // Returns an undefined value if the entry is not found.
   Handle<Object> Lookup(MapHandleList* maps, Code::Flags flags);
 
-  Object* Lookup(MapList* maps, Code::Flags flags);
-
   static inline PolymorphicCodeCache* cast(Object* obj);
 
 #ifdef OBJECT_PRINT
   inline void PolymorphicCodeCachePrint() {
     PolymorphicCodeCachePrint(stdout);
   }
   void PolymorphicCodeCachePrint(FILE* out);
 #endif
 #ifdef DEBUG
   void PolymorphicCodeCacheVerify();
 #endif
 
   static const int kCacheOffset = HeapObject::kHeaderSize;
   static const int kSize = kCacheOffset + kPointerSize;
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PolymorphicCodeCache);
 };
 
 
 class PolymorphicCodeCacheHashTable
     : public HashTable<CodeCacheHashTableShape, HashTableKey*> {
  public:
-  Object* Lookup(MapList* maps, int code_kind);
-  MUST_USE_RESULT MaybeObject* Put(MapList* maps, int code_kind, Code* code);
+  Object* Lookup(MapHandleList* maps, int code_kind);
+
+  MUST_USE_RESULT MaybeObject* Put(MapHandleList* maps,
+                                   int code_kind,
+                                   Code* code);
 
   static inline PolymorphicCodeCacheHashTable* cast(Object* obj);
 
   static const int kInitialSize = 64;
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PolymorphicCodeCacheHashTable);
 };
 
 
 enum AllowNullsFlag {ALLOW_NULLS, DISALLOW_NULLS};
@@ skipping 1790 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_