Check that external references are registered in the serializer.

src/serialize.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_SERIALIZE_H_
 #define V8_SERIALIZE_H_
 
 #include "src/compiler.h"
 #include "src/hashmap.h"
 #include "src/heap-profiler.h"
@@ skipping 63 matching lines @@
 
   // For a few types of references, we can get their address from their id.
   void AddFromId(TypeCode type,
                  uint16_t id,
                  const char* name,
                  Isolate* isolate);
 
   // For other types of references, the caller will figure out the address.
   void Add(Address address, TypeCode type, uint16_t id, const char* name);
 
+  static int Compare(const ExternalReferenceEntry* a,
+                     const ExternalReferenceEntry* b) {
+    return static_cast<int>(a->code) - static_cast<int>(b->code);
+  }
+
   List<ExternalReferenceEntry> refs_;
   int max_id_[kTypeCodeCount];
 };
 
 
 class ExternalReferenceEncoder {
  public:
   explicit ExternalReferenceEncoder(Isolate* isolate);
 
   uint32_t Encode(Address key) const;
@@ skipping 573 matching lines @@
   static const int kCheckSumOffset = 0;
   static const int kReservationsOffset = 1;
   static const int kHeaderEntries = 8;
 
   ScriptData* script_data_;
   bool owns_script_data_;
 };
 } }  // namespace v8::internal
 
 #endif  // V8_SERIALIZE_H_