I was able to get rid of the message by adding the following...
chromeOptions.AddExcludedArgument("enable-automation")
This in turn causes a popup in Chrome titled "Disable developer mode extensions". I am able to close this popup in VB.NET by calling CloseChromeDialogDisableDeveloperModeExtensions()
method below at the appropriate time(s).
I hope this helps!
Private Declare Auto Function FindWindow Lib "user32.dll" (ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr
Private Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA" (hWnd As IntPtr, wMsg As Int32, wParam As Int32, lParam As String) As Int32
Private Sub CloseChromeDialogDisableDeveloperModeExtensions()
Try
Const WM_CLOSE As Integer = 16
Dim popupHandle As IntPtr = FindWindow("Chrome_WidgetWin_1", "Disable developer mode extensions")
If popupHandle <> New IntPtr(0) Then
SendMessage(popupHandle, WM_CLOSE, 0, Nothing)
End If
Catch ex As Exception
'swallow exception
End Try
End Sub