Add unittests for the detection of md[2,4,5] when verifying certificates

BUG=101123
TEST=net_unittests:X509CertificateWeakDigestTest.*


Review URL: http://codereview.chromium.org/8391036

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@108074 0039d316-1c4b-4281-b951-d872f2087c98
13 files changed