Push up notification for Google chrome

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Javascript

.NET

Hi,

Push up notification for google chrome.

I have created FCM cloud messaging services in google.

I have two question

1) How to get the register ID of Google Chrome.
2) How to send the message to client/Google Chrome.

What I have tried:

I did in android to send the message with the below code.

i got the google chrome id from GCM Notification extension from chrome extension.

then i tried to send with below code saying senderIDMismatch, below code working fine in android device.

Private Sub Frm_SendNotification()

        Dim RegId As String
        Dim ApplicationId As String
        Dim SENDER_ID As String


        RegId = ""
        ApplicationId = ""
        SENDER_ID = ""
        Dim value = TextBox1.Text
        'message text box
        Dim tRequest As WebRequest
        tRequest = WebRequest.Create("https://android.googleapis.com/gcm/send")
        tRequest.Method = "post"
        tRequest.ContentType = "application/x-www-form-urlencoded;charset=UTF-8"
        tRequest.Headers.Add(String.Format("Authorization: key={0}", ApplicationId))
        tRequest.Headers.Add(String.Format("Sender: id={0}", SENDER_ID))
        'Data post to the Server
        Dim postData As String = (Convert.ToString("collapse_key=score_update&time_to_live=108&delay_while_idle=1&data.message=" + value + "&data.time=" + System.DateTime.Now.ToString() + "&registration_id=") & RegId) + ""
        Console.WriteLine(postData)

        Dim byteArray As [Byte]() = Encoding.UTF8.GetBytes(postData)
        tRequest.ContentLength = byteArray.Length
        Dim dataStream As Stream = tRequest.GetRequestStream()
        dataStream.Write(byteArray, 0, byteArray.Length)
        dataStream.Close()
        Dim tResponse As WebResponse = tRequest.GetResponse()
        dataStream = tResponse.GetResponseStream()
        Dim tReader As New StreamReader(dataStream)
        Dim sResponseFromServer As [String] = tReader.ReadToEnd()
        'Get response from GCM server  
        Label1.Text = sResponseFromServer
        'Assigning GCM response to Label text
        tReader.Close()
        dataStream.Close()
        tResponse.Close()




    End Sub