**Deprecated.**. HTTP/2 and many HTTP/1.1 servers don't support this; we recommend leaving it set to false (default).
このプロパティーは UnityWebRequest が HTTP 1.1 チャンク転送エンコード方法を採用すべきかどうかを示します。システムが一部のデータを送信し、100/続行 HTTP レスポンスのデータサーバーが表示されるシステムを可能にします。このプロパティーは Send を呼び出した後、変更できません。
In general, this property should usually be set to true, as it can conserve bandwidth when sending large amounts of data to the server, however older servers may not support it yet. This setting has no impact on requests which do not transmit data to the server, such as GET requests.
Note: On WebGL build targets, this setting is ignored. Instead, the web browser handles protocol negotiations.
Default value: false.