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: svn://svn.chromium.org/chrome/trunk/src@58822 0039d316-1c4b-4281-b951-d872f2087c98

net/http/http_auth.cc

@@ -54,8 +54,8 @@ void HttpAuth::ChooseBestChallenge(
     int rv = http_auth_handler_factory->CreateAuthHandlerFromString(
         cur_challenge, target, origin, net_log, &cur);
     if (rv != OK) {
-      LOG(WARNING) << "Unable to create AuthHandler. Status: "
-                   << ErrorToString(rv) << " Challenge: " << cur_challenge;
+      LOG(INFO) << "Unable to create AuthHandler. Status: "
+                << ErrorToString(rv) << " Challenge: " << cur_challenge;
       continue;
     }
     if (cur.get() && (!best.get() || best->score() < cur->score()) &&