[PATCH] Remove code duplication and cut dependency from clangRewrite on clangAst.

[Argyrios Kyrtzidis]

LGTM.

> On Oct 23, 2014, at 11:42 AM, Daniel Jasper <djasper at google.com> wrote:
> 
> Yes, tested with CLANG_ENABLE_ARCMT.
> 
> http://reviews.llvm.org/D5939
> 
>