Serializer: move to a subfolder and clean up includes.

src/snapshot/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/hashmap.h"
 #include "src/heap-profiler.h"
 #include "src/isolate.h"
-#include "src/snapshot-source-sink.h"
+#include "src/snapshot/snapshot-source-sink.h"
 
 namespace v8 {
 namespace internal {
 
 class ScriptData;
 
 static const int kDeoptTableSerializeEntryCount = 64;
 
 // ExternalReferenceTable is a helper class that defines the relationship
 // between external references and their encodings. It is used to build
@@ skipping 949 matching lines @@
       kNumInternalizedStringsOffset + kInt32Size;
   static const int kNumCodeStubKeysOffset = kNumReservationsOffset + kInt32Size;
   static const int kPayloadLengthOffset = kNumCodeStubKeysOffset + kInt32Size;
   static const int kChecksum1Offset = kPayloadLengthOffset + kInt32Size;
   static const int kChecksum2Offset = kChecksum1Offset + kInt32Size;
   static const int kHeaderSize = kChecksum2Offset + kInt32Size;
 };
 } }  // namespace v8::internal
 
 #endif  // V8_SERIALIZE_H_