ValueSerializer: Add SetTreatArrayBufferViewsAsHostObjects() flag

src/value-serializer.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_VALUE_SERIALIZER_H_
 #define V8_VALUE_SERIALIZER_H_
 
 #include <cstdint>
 #include <vector>
 
@@ skipping 66 matching lines @@
 
   /*
    * Publicly exposed wire format writing methods.
    * These are intended for use within the delegate's WriteHostObject method.
    */
   void WriteUint32(uint32_t value);
   void WriteUint64(uint64_t value);
   void WriteRawBytes(const void* source, size_t length);
   void WriteDouble(double value);
 
+  /*
+   * Indicate whether to treat ArrayBufferView objects as host objects,
+   * i.e. pass them to Delegate::WriteHostObject. This should not be
+   * called when no Delegate was passed.
+   *
+   * The default is not to treat ArrayBufferViews as host objects.
+   */
+  void SetTreatArrayBufferViewsAsHostObjects(bool mode);
+
  private:
   // Managing allocations of the internal buffer.
   Maybe<bool> ExpandBuffer(size_t required_capacity);
 
   // Writing the wire format.
   void WriteTag(SerializationTag tag);
   template <typename T>
   void WriteVarint(T value);
   template <typename T>
   void WriteZigZag(T value);
@@ skipping 34 matching lines @@
    * throwing an exception appropriate for the host.
    */
   void ThrowDataCloneError(MessageTemplate::Template template_index);
   V8_NOINLINE void ThrowDataCloneError(MessageTemplate::Template template_index,
                                        Handle<Object> arg0);
 
   Maybe<bool> ThrowIfOutOfMemory();
 
   Isolate* const isolate_;
   v8::ValueSerializer::Delegate* const delegate_;
+  bool treat_array_buffer_views_as_host_objects_ = false;
   uint8_t* buffer_ = nullptr;
   size_t buffer_size_ = 0;
   size_t buffer_capacity_ = 0;
   bool out_of_memory_ = false;
   Zone zone_;
 
   // To avoid extra lookups in the identity map, ID+1 is actually stored in the
   // map (checking if the used identity is zero is the fast way of checking if
   // the entry is new).
   IdentityMap<uint32_t> id_map_;
@@ skipping 129 matching lines @@
   Handle<FixedArray> id_map_;
   MaybeHandle<SeededNumberDictionary> array_buffer_transfer_map_;
 
   DISALLOW_COPY_AND_ASSIGN(ValueDeserializer);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_VALUE_SERIALIZER_H_