ValueSerializer: Add SetTreatArrayBufferViewsAsHostObjects() flag

src/value-serializer.h

Index: src/value-serializer.h
diff --git a/src/value-serializer.h b/src/value-serializer.h
index 6262c2eaabe5cfb024380b9099c8a5a45e522f8c..4f3fb2cf00e41bbb2bbae71ea3c183a6e3543b1d 100644
--- a/src/value-serializer.h
+++ b/src/value-serializer.h
@@ -84,6 +84,15 @@ class ValueSerializer {
   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);
@@ -138,6 +147,7 @@ class ValueSerializer {
 
   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;