On the fsfs-format7 branch: get everything to compile, link and test again.
Due to the refactorings on our branch, we need to adapt the source structure.

* subversion/libsvn_fs_fs/cached_data.h
  (svn_fs_fs__rep_chain_length): declare new internal API function

* subversion/libsvn_fs_fs/cached_data.c
  (svn_fs_fs__rep_chain_length): implement new internal API function,
   taken from choose_delta_base

* subversion/libsvn_fs_fs/fs_fs.c
  (verify_walker): baton is always available; call svn_fs_fs__check_rep
   to actually verify the given revision

* subversion/libsvn_fs_fs/transaction.c
  (verify_walker): drop local declaration as it is no longer needed
  (choose_delta_base): call the new svn_fs_fs__rep_chain_length() API
   to check for delta chain lengths
  (get_shared_rep): call svn_fs_fs__check_rep directly

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/fsfs-format7@1442514 13f79535-47bb-0310-9956-ffa450edef68