MAC Cookies (2 of N)

This CL contains the algorithmic guts of MAC cookies, including generating
the canonical represntation of the request and signing it using HMAC.  This
CL does not include support for body_hash, which requires some more thought.
Review URL: http://codereview.chromium.org/6901121

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@83600 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed