Remove support for RSA Origin Bound Certificates.

Generating them is too slow & power hungry, especially on mobile
devices.

BUG=none
TEST=unittests


Review URL: http://codereview.chromium.org/9372118

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@124124 0039d316-1c4b-4281-b951-d872f2087c98
11 files changed