Fix again HeapEntry size problem, now platform-independent way.

src/profile-generator.cc

 // Copyright 2010 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 852 matching lines @@
                      Type type,
                      const char* name,
                      uint64_t id,
                      int self_size,
                      int children_count,
                      int retainers_count) {
   snapshot_ = snapshot;
   type_ = type;
   painted_ = kUnpainted;
   name_ = name;
-#ifdef WIN32
-  *(reinterpret_cast<uint64_t*>(&id_)) = id;
-#else
-  id_ = id;
-#endif
   self_size_ = self_size;
   retained_size_ = 0;
   children_count_ = children_count;
   retainers_count_ = retainers_count;
   dominator_ = NULL;
+
+  union {
+    uint64_t set_id;
+    Id stored_id;
+  } id_adaptor = {id};
+  id_ = id_adaptor.stored_id;
 }
 
 
 void HeapEntry::SetNamedReference(HeapGraphEdge::Type type,
                                   int child_index,
                                   const char* name,
                                   HeapEntry* entry,
                                   int retainer_index) {
   children_arr()[child_index].Init(child_index, type, name, entry);
   entry->retainers_arr()[retainer_index] = children_arr() + child_index;
@@ skipping 1866 matching lines @@
 void HeapSnapshotJSONSerializer::SortHashMap(
     HashMap* map, List<HashMap::Entry*>* sorted_entries) {
   for (HashMap::Entry* p = map->Start(); p != NULL; p = map->Next(p))
     sorted_entries->Add(p);
   sorted_entries->Sort(SortUsingEntryValue);
 }
 
 } }  // namespace v8::internal
 
 #endif  // ENABLE_LOGGING_AND_PROFILING