[deserializer] Make large object deserialization GC safe

src/snapshot/deserializer.h

 // Copyright 2016 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_SNAPSHOT_DESERIALIZER_H_
 #define V8_SNAPSHOT_DESERIALIZER_H_
 
 #include "src/heap/heap.h"
 #include "src/objects.h"
 #include "src/snapshot/serializer-common.h"
@@ skipping 75 matching lines @@
     DCHECK_LE(alignment, kDoubleUnaligned);
     next_alignment_ = static_cast<AllocationAlignment>(alignment);
   }
 
   void DeserializeDeferredObjects();
   void DeserializeEmbedderFields(
       v8::DeserializeEmbedderFieldsCallback embedder_fields_deserializer);
 
   void FlushICacheForNewIsolate();
   void FlushICacheForNewCodeObjectsAndRecordEmbeddedObjects();
+  void RecordWritesForLargeObjects();
 
   void CommitPostProcessedObjects(Isolate* isolate);
 
   void PrintDisassembledCodeObjects();
 
   // Fills in some heap data in an area from start to end (non-inclusive).  The
   // space id is used for the write barrier.  The object_address is the address
   // of the object we are writing into, or NULL if we are not writing into an
   // object, i.e. if we are writing a series of tagged values that are not on
   // the heap. Return false if the object content has been deferred.
@@ skipping 41 matching lines @@
 
   AllocationAlignment next_alignment_;
 
   DISALLOW_COPY_AND_ASSIGN(Deserializer);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_SNAPSHOT_DESERIALIZER_H_