tree e5eccb12bfb9014040c8529530887b2ba6228a61
parent f4956ec6f6fa16000090540cdf6dd5967b4153df
author Changcheng Xiao <xchangcheng@google.com> 1531829186 +0200
committer Changcheng Xiao <xchangcheng@google.com> 1531839158 +0200

DeleteRef: expose separate methods for deleting single/multi refs

This commit removes DeleteRef#delete and expose two methods
for deleting one single ref and multiple refs respectively.
This makes the intention of the caller more clear and thus
easier to read.

The existing code doesn't check whether the user has DELETE
permission when the user tries to delete a single ref through
"Delete Branches" REST API. "Delete Branches" assumes
permissions being checked in DeleteRef#delete but when there is
only one ref, the deletion is delegated to
DeleteRef#deleteSingleRef which doesn't perform any permission
check. This will be fixed in the child commit.

Change-Id: I3d0aacb0bc7a9adc9b753b9756ca0333c95c7e76