[clang] [analyzer] WebKit checkers: support ref and deref defined on different classes. (PR #68170)

[Artem Dergachev via cfe-commits]

https://github.com/haoNoQ commented:

@rniwa I had a look and I think everything looks mostly good! I found one possible bug and made a couple comments about how I'm frustrated about code duplication.

https://github.com/llvm/llvm-project/pull/68170