Use ProtoOutputStream's bytesWritten to properly estimate the size of

    std::unique_ptr<std::vector<uint8_t>> buffer = serializeProto();

    startNewProtoOutputStream(endTime);

    mByteSize = 0;

    return buffer;

}

    event.ToProto(*mProto);

    mProto->end(eventToken);

    mProto->end(wrapperToken);

    // TODO: Increment mByteSize with a real value. Until this feature is working, we assume 50

    // bytes.

    mByteSize += 50;

}

size_t EventMetricProducer::byteSize() {

    return mByteSize;

    return mProto->bytesWritten();

}

}  // namespace statsd

private:

    const EventMetric mMetric;

    size_t mByteSize;

};

}  // namespace statsd