Use standard routine to compute pointer hashs in heap profiler

src/heap-snapshot-generator.h

 // Copyright 2013 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 248 matching lines @@
   struct TimeInterval {
     explicit TimeInterval(SnapshotObjectId id) : id(id), size(0), count(0) { }
     SnapshotObjectId id;
     uint32_t size;
     uint32_t count;
   };
 
   void UpdateHeapObjectsMap();
   void RemoveDeadEntries();
 
-  static bool AddressesMatch(void* key1, void* key2) {
-    return key1 == key2;
-  }
-
-  static uint32_t AddressHash(Address addr) {
-    return ComputeIntegerHash(
-        static_cast<uint32_t>(reinterpret_cast<uintptr_t>(addr)),
-        v8::internal::kZeroHashSeed);
-  }
-
   SnapshotObjectId next_id_;
   HashMap entries_map_;
   List<EntryInfo> entries_;
   List<TimeInterval> time_intervals_;
   Heap* heap_;
 
   DISALLOW_COPY_AND_ASSIGN(HeapObjectsMap);
 };
 
 
@@ skipping 389 matching lines @@
   friend class HeapSnapshotJSONSerializerIterator;
 
   DISALLOW_COPY_AND_ASSIGN(HeapSnapshotJSONSerializer);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_SNAPSHOT_GENERATOR_H_