Make V8ValueConverter.FromV8Value behave similarly to JSON.stringify

content/renderer/v8_value_converter_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_RENDERER_V8_VALUE_CONVERTER_IMPL_H_
 #define CONTENT_RENDERER_V8_VALUE_CONVERTER_IMPL_H_
 
 #include <set>
 
 #include "base/compiler_specific.h"
 #include "content/common/content_export.h"
 #include "content/public/renderer/v8_value_converter.h"
 
 namespace base {
 class BinaryValue;
 class DictionaryValue;
 class ListValue;
 class Value;
 }
 
 class CONTENT_EXPORT V8ValueConverterImpl : public content::V8ValueConverter {
  public:
   V8ValueConverterImpl();
 
   // V8ValueConverter implementation.
-  virtual bool GetUndefinedAllowed() const OVERRIDE;
-  virtual void SetUndefinedAllowed(bool val) OVERRIDE;
+  virtual UndefinedValueBehavior GetUndefinedValueBehavior() const OVERRIDE;
+  virtual void SetUndefinedValueBehavior(UndefinedValueBehavior val) OVERRIDE;
   virtual bool GetDateAllowed() const OVERRIDE;
   virtual void SetDateAllowed(bool val) OVERRIDE;
   virtual bool GetRegexpAllowed() const OVERRIDE;
   virtual void SetRegexpAllowed(bool val) OVERRIDE;
   virtual bool GetStripNullFromObjects() const OVERRIDE;
   virtual void SetStripNullFromObjects(bool val) OVERRIDE;
   virtual v8::Handle<v8::Value> ToV8Value(
       const base::Value* value,
       v8::Handle<v8::Context> context) const OVERRIDE;
   virtual base::Value* FromV8Value(
@@ skipping 13 matching lines @@
                            std::set<int>* unique_set) const;
 
   // This will convert objects of type ArrayBuffer or any of the
   // ArrayBufferView subclasses. The return value will be NULL if |value| is
   // not one of these types.
   base::BinaryValue* FromV8Buffer(v8::Handle<v8::Value> value) const;
 
   base::Value* FromV8Object(v8::Handle<v8::Object> object,
                             std::set<int>* unique_set) const;
 
-  // If true, we will convert undefined JavaScript values to null.
-  bool undefined_allowed_;
+  // Determines how undefined values should be converted.
+  UndefinedValueBehavior undefined_value_behavior_;
 
   // If true, we will convert Date JavaScript objects to doubles.
   bool date_allowed_;
 
   // If true, we will convet RegExp JavaScript objects to string.
   bool regexp_allowed_;
 
   // If true, undefined and null values are ignored when converting v8 objects
   // into Values.
   bool strip_null_from_objects_;
 };
 
 #endif  // CONTENT_RENDERER_V8_VALUE_CONVERTER_IMPL_H_