Merge r25564 and r26588 from the trunk....

Merge r25564 and r26588 from the trunk.

r25564: Use SSPI for NTLM authentication on Windows.

Add an explicit embedded_identity_used_ boolean member to
make sure we use the username/password in the URL only once
for the transaction.  This allows us to reset
auth_identity_[target].source to HttpAuth::IDENT_SRC_NONE
after auth failed.

Initial patch by Arindam.

Original review URL: http://codereview.chromium.org/159656

r26588: We should pass the service principal name (SPN) of the
format "HTTP/host:port" as the third argument (pszTargetName)
to InitializeSecurityContext.  This requires adding an
origin parameter to some methods.

Remove obsolete (and incorrect) logging code in
HttpNetworkTransaction::PrepareForAuthRestart().

R=laforge
BUG=19, 18009, 20560
TEST=1. Open a webpage that requests NTLM authentication
on Windows.  2. New unit test for wrong auth identity in
URL.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=28078

[wtc, 2009-10-03 00:16:55]

Anthony, please approve this merge to the 195 branch.

[laforge, 2009-10-05 18:37:05]

On 2009/10/03 00:16:55, wtc wrote:
> Anthony, please approve this merge to the 195 branch.

LGTM