Do not map Windows certificate errors returned by Schannel's...

If Schannel's InitializeSecurityContext calls return
certificate errors, do not map them to our (server)
certificate errors because the errors are referring to the
(missing) client certificate.  If we incorrectly handle
them as server certificate errors, we will crash because
we can't get the server certificate from Schannel when the
handshake fails.

Fumitoshi Ukai of Google tracked down the bug and proposed
an alternative fix.

R=rvargas,ukai
BUG=http://crbug.com/11646
TEST=Visit https://www.cdep.ro/.  Chromium should not crash.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=16026

[wtc, 2009-05-13 23:49:54]

Ricardo, please review this changelist.

Fumitoshi, this is just FYI.  Thanks for tracking down the
crash!

[rvargas (doing something else), 2009-05-14 00:34:55]

LGTM