Demote LOG(WARNING) about unable to handle an auth scheme to LOG(INFO).
Demote LOG(WARNING) about unable to handle an auth scheme to LOG(INFO).

This shows up in the field a number of times due to the Kerberos HTTP authentication protocol not being supported by Chrome, and leads people to believe it's a bigger problem than it actually is.

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/3369004

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@58822 0039d316-1c4b-4281-b951-d872f2087c98

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