Revert "mshtml: Use QueryService to get IHttpNegotiate in get_post_data_stream."

[Jacek Caban]

Hi Vitaliy,

Vitaliy Margolen wrote:
> This reverts commit c32cca8066807d09e3b953aee9242eba8cfa8cdb.
>
> This patch is obviously wrong since it broke Steam Community page.
>
This patch is obviously good and fixed a real problem, so the problem 
must be somewhere else. I would try to fix it, but Community tab works 
fine for me so I can't test it.


Jacek