[Binding] [Refactoring] Make SerializedScriptValueWriter protected

third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.cpp

 // Copyright 2014 The Chromium 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 "bindings/core/v8/ScriptValueSerializer.h"
 
 #include "bindings/core/v8/Transferables.h"
 #include "bindings/core/v8/V8ArrayBuffer.h"
 #include "bindings/core/v8/V8ArrayBufferView.h"
 #include "bindings/core/v8/V8Blob.h"
@@ skipping 744 matching lines @@
 ScriptValueSerializer::Status ScriptValueSerializer::serialize(v8::Local<v8::Value> value)
 {
     v8::HandleScope scope(isolate());
     m_writer.writeVersion();
     StateBase* state = doSerialize(value, 0);
     while (state)
         state = state->advance(*this);
     return m_status;
 }
 
+// static
+String ScriptValueSerializer::serializeWTFString(const String& data)
+{
+    SerializedScriptValueWriter valueWriter;
+    valueWriter.writeWebCoreString(data);
+    return valueWriter.takeWireString();
+}
+
+// static
+String ScriptValueSerializer::serializeNullValue()
+{
+    SerializedScriptValueWriter valueWriter;
+    valueWriter.writeNull();
+    return valueWriter.takeWireString();
+}
+
 ScriptValueSerializer::StateBase* ScriptValueSerializer::doSerialize(v8::Local<v8::Value> value, ScriptValueSerializer::StateBase* next)
 {
     m_writer.writeReferenceCount(m_nextObjectReference);
 
     if (value.IsEmpty())
         return handleError(InputError, "The empty property cannot be cloned.", next);
 
     uint32_t objectReference;
     if ((value->IsObject() || value->IsDate() || value->IsRegExp())
         && m_objectPool.tryGet(value.As<v8::Object>(), &objectReference)) {
@@ skipping 1605 matching lines @@
         return false;
     uint32_t objectReference = m_openCompositeReferenceStack[m_openCompositeReferenceStack.size() - 1];
     m_openCompositeReferenceStack.shrink(m_openCompositeReferenceStack.size() - 1);
     if (objectReference >= m_objectPool.size())
         return false;
     *object = m_objectPool[objectReference];
     return true;
 }
 
 } // namespace blink