New policy protobuf protocol.

(Second attempt to land http://codereview.chromium.org/6409040/)

- cloud_policy.proto autogenerated from policy_templats.json
- C++ method decoding the protobuf also autogenerated from policy_templates.json
- changed policy fetching mechanism to fetch new-style policy protobufs

BUG=68309, chromium-os:11253, chromium-os:11255
TEST=CloudPolicyCacheTest.*; also manual test against python testserver

Review URL: http://codereview.chromium.org/6523058

git-svn-id: http://src.chromium.org/svn/trunk/src/chrome/browser/policy/proto@75106 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
4 files changed