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.
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.
Review URL: http://codereview.chromium.org/113375

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@16026 0039d316-1c4b-4281-b951-d872f2087c98

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