On the 'move-tracking-2' branch: Make the remaining branch state functions work with derived branch classes by not directly accessing private data.
On the 'move-tracking-2' branch: Make the remaining branch state functions
work with derived branch classes by not directly accessing private data.

* subversion/libsvn_delta/branch.c
  (svn_branch_root_eid,
   svn_branch_get_path_by_eid,
   svn_branch_get_eid_by_path): Use public accessor methods.

git-svn-id: 486ec3464084f62cfe8608152673c827b947faa2@1713616 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion