Get all of the certificate data for downloads from the WinVerifyTrust result.

      This should speed up the certificate extraction significantly.

BUG=102540
TEST=SignatureUtilWinTest.* pass


Review URL: http://codereview.chromium.org/8528043

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110151 0039d316-1c4b-4281-b951-d872f2087c98