Add a const version of a method, to be consistent with other methods
of the same type.  I think this was just an oversight before.

Reviewed by chandlerc.  Submitted as an "obvious" fix.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@107737 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed