/// <summary>
    /// WebViewを開く。
    /// </summary>
    void OnOpenWebView()
    {
        var webViewData = new WebViewData();

        webViewData.Url      = GetLocalFilePath("WebViewSample.html");
        webViewData.OnOpened = () => statusLbl.text = "Open";
        webViewData.OnClosed = () => statusLbl.text = "Close";
        webView.OpenWebView(webViewData);
    }