Fix API breakage on ChangeDetailService

The Mylyn Reviews project pointed out Gerrit changed the API
signature of a JSON method they use remotely. Fix the API back to the
original signature, and define a new method with the extra arguments.

Change-Id: I51cbbdd64bdb72a666a6b5266db3b93494b75182
Signed-off-by: Shawn O. Pearce <sop@google.com>
5 files changed