Check and invalidate cached credentials if they were used for preemptive authentication and were rejected by the server.

BUG=72589
TEST=net_unittests --gtest_filter=HttpAuthHandler*.HandleAnotherChallenge

Review URL: http://codereview.chromium.org/6525035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@75390 0039d316-1c4b-4281-b951-d872f2087c98
7 files changed