Snapshots: Add --extra-code flag to mksnapshot which lets you specify a file

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 192 matching lines @@
   f(13, 28) \
   f(14, 32) \
   f(15, 36)
 
 // The Serializer/Deserializer class is a common superclass for Serializer and
 // Deserializer which is used to store common constants and methods used by
 // both.
 class SerializerDeserializer: public ObjectVisitor {
  public:
   static void Iterate(ObjectVisitor* visitor);
-  static void SetSnapshotCacheSize(int size);
 
  protected:
   // Where the pointed-to object can be found:
   enum Where {
     kNewObject = 0,                 // Object is next in snapshot.
     // 1-8                             One per space.
     kRootArray = 0x9,               // Object is found in root array.
     kPartialSnapshotCache = 0xa,    // Object is in the cache.
     kExternalReference = 0xb,       // Pointer to an external reference.
     kSkip = 0xc,                    // Skip a pointer sized cell.
@@ skipping 419 matching lines @@
  private:
   virtual bool ShouldBeInThePartialSnapshotCache(HeapObject* o) {
     return false;
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SERIALIZE_H_