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On Windows, rather than converting the entire certificate 
name to a string and attempting to parse out the components 
and values, iterate through the relativeDistinguishedName 
and AttributeTypeAndValue pairs to extract each name 
component.

This is to ensure that:
1) When multiple AVAs are present in an RDN, ALL AVAs are
   parsed.
2) When converting an AVA to a string, no extra escaping is
   applied.

This also fixes domainComponent parsing on OS X, so that
unittests with a domainComponent can pass.

BUG=101009, 102839
TEST=net_unittests:X509CertificateTest has two new regression
tests. Additionally, sample a variety of SSL sites and ensure no
regressions, paying attention to internationalized domains.


Review URL: http://codereview.chromium.org/8608003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@112650 0039d316-1c4b-4281-b951-d872f2087c98