> // DEPRECATED, use std::make_unique<Value>(const BlobStorage&) instead.

We use it in a few files in `atom/common/native_mate_converters/*.cc`.
atom/common/native_mate_converters/v8_value_converter.cc
public:
  ScopedUniquenessGuard(V8ValueConverter::FromV8ValueState* state,
                        v8::Local<v8::Object> value)
      : state_(state),
        value_(value),
        is_valid_(state_->AddToUniquenessCheck(value_)) {}
  ~ScopedUniquenessGuard() {
    if (is_valid_) {
      bool removed = state_->RemoveFromUniquenessCheck(value_);
      DCHECK(removed);
    }
  }
  bool is_valid() const { return is_valid_; }
 private:
  typedef std::multimap<int, v8::Local<v8::Object>> HashToHandleMap;
  V8ValueConverter::FromV8ValueState* state_;
  v8::Local<v8::Object> value_;
  bool is_valid_;
  DISALLOW_COPY_AND_ASSIGN(ScopedUniquenessGuard);
};
V8ValueConverter::V8ValueConverter() {}