Refactoring: HashMap: provide a pointer match function, so users don't need to.

src/serialize.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 106 matching lines @@
   const char* NameOfAddress(Address key) const;
 
  private:
   HashMap encodings_;
   static uint32_t Hash(Address key) {
     return static_cast<uint32_t>(reinterpret_cast<uintptr_t>(key) >> 2);
   }
 
   int IndexOf(Address key) const;
 
-  static bool Match(void* key1, void* key2) { return key1 == key2; }
-
   void Put(Address key, int index);
 
   Isolate* isolate_;
 };
 
 
 class ExternalReferenceDecoder {
  public:
   explicit ExternalReferenceDecoder(Isolate* isolate);
   ~ExternalReferenceDecoder();
@@ skipping 268 matching lines @@
   virtual int Position() = 0;
 };
 
 
 // Mapping objects to their location after deserialization.
 // This is used during building, but not at runtime by V8.
 class SerializationAddressMapper {
  public:
   SerializationAddressMapper()
       : no_allocation_(),
-        serialization_map_(new HashMap(&SerializationMatchFun)) { }
+        serialization_map_(new HashMap(HashMap::PointersMatch)) { }
 
   ~SerializationAddressMapper() {
     delete serialization_map_;
   }
 
   bool IsMapped(HeapObject* obj) {
     return serialization_map_->Lookup(Key(obj), Hash(obj), false) != NULL;
   }
 
   int MappedTo(HeapObject* obj) {
     ASSERT(IsMapped(obj));
     return static_cast<int>(reinterpret_cast<intptr_t>(
         serialization_map_->Lookup(Key(obj), Hash(obj), false)->value));
   }
 
   void AddMapping(HeapObject* obj, int to) {
     ASSERT(!IsMapped(obj));
     HashMap::Entry* entry =
         serialization_map_->Lookup(Key(obj), Hash(obj), true);
     entry->value = Value(to);
   }
 
  private:
-  static bool SerializationMatchFun(void* key1, void* key2) {
-    return key1 == key2;
-  }
-
   static uint32_t Hash(HeapObject* obj) {
     return static_cast<int32_t>(reinterpret_cast<intptr_t>(obj->address()));
   }
 
   static void* Key(HeapObject* obj) {
     return reinterpret_cast<void*>(obj->address());
   }
 
   static void* Value(int v) {
     return reinterpret_cast<void*>(v);
@@ skipping 208 matching lines @@
  private:
   virtual bool ShouldBeInThePartialSnapshotCache(HeapObject* o) {
     return false;
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SERIALIZE_H_