Throw exceptions for errors in v8::ValueSerializer.

src/api.cc

 // 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.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 2820 matching lines @@
   Local<String> result;
   has_pending_exception =
       !ToLocal<String>(i::Object::ToString(isolate, maybe), &result);
   RETURN_ON_FAILED_EXECUTION(String);
   RETURN_ESCAPED(result);
 }
 
 // --- V a l u e   S e r i a l i z a t i o n ---
 
 struct ValueSerializer::PrivateData {
-  explicit PrivateData(i::Isolate* i) : isolate(i), serializer(i) {}
+  explicit PrivateData(i::Isolate* i, ValueSerializer::Delegate* delegate)
+      : isolate(i), serializer(i, delegate) {}
   i::Isolate* isolate;
   i::ValueSerializer serializer;
 };
 
 ValueSerializer::ValueSerializer(Isolate* isolate)
-    : private_(new PrivateData(reinterpret_cast<i::Isolate*>(isolate))) {}
+    : ValueSerializer(isolate, nullptr) {}
+
+ValueSerializer::ValueSerializer(Isolate* isolate, Delegate* delegate)
+    : private_(
+          new PrivateData(reinterpret_cast<i::Isolate*>(isolate), delegate)) {}
 
 ValueSerializer::~ValueSerializer() { delete private_; }
 
 void ValueSerializer::WriteHeader() { private_->serializer.WriteHeader(); }
 
 Maybe<bool> ValueSerializer::WriteValue(Local<Context> context,
                                         Local<Value> value) {
   PREPARE_FOR_EXECUTION_PRIMITIVE(context, ValueSerializer, WriteValue, bool);
   i::Handle<i::Object> object = Utils::OpenHandle(*value);
   Maybe<bool> result = private_->serializer.WriteObject(object);
@@ skipping 6249 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8