Introduce code serializer/deserializer.

src/snapshot-source-sink.cc

 // Copyright 2014 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.
 
 
 #include "src/snapshot-source-sink.h"
 
 #include "src/base/logging.h"
 #include "src/handles-inl.h"
 #include "src/serialize.h"  // for SerializerDeserializer::nop() in AtEOF()
@@ skipping 73 matching lines @@
   if (position_ + size < length_) {
     *data = &data_[position_];
     Advance(size);
     return true;
   } else {
     Advance(length_ - position_);  // proceed until end.
     return false;
   }
 }
 
+
+void DebugSnapshotSink::Put(int byte, const char* description) {
+  PrintF("%24s: %x\n", description, byte);
+  sink_->Put(byte, description);
+}
+
 }  // namespace v8::internal
 }  // namespace v8