HeapProfiler: compile fix for win x64.

src/heap-snapshot-generator.cc

 // 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 2680 matching lines @@
   writer_->AddCharacter('\"');
 }
 
 
 void HeapSnapshotJSONSerializer::SerializeStrings() {
   ScopedVector<const unsigned char*> sorted_strings(
       strings_.occupancy() + 1);
   for (HashMap::Entry* entry = strings_.Start();
        entry != NULL;
        entry = strings_.Next(entry)) {
-    sorted_strings[reinterpret_cast<uintptr_t>(entry->value)] =
-        reinterpret_cast<const unsigned char*>(entry->key);
+    int index = static_cast<int>(reinterpret_cast<uintptr_t>(entry->value));
+    sorted_strings[index] = reinterpret_cast<const unsigned char*>(entry->key);
   }
   writer_->AddString("\"<dummy>\"");
   for (int i = 1; i < sorted_strings.length(); ++i) {
     writer_->AddCharacter(',');
     SerializeString(sorted_strings[i]);
     if (writer_->aborted()) return;
   }
 }
 
 
 } }  // namespace v8::internal