[clang] [alpha.webkit.UncountedCallArgsChecker] Emit a warning for a WeakPtr argument. (PR #184563)

[Balázs Benics via cfe-commits]

https://github.com/steakhal approved this pull request.

The parts that this PR functionally touches look good. I spotted one potential issue with structured-bindings and holdingvars that could be checked later if needed.

https://github.com/llvm/llvm-project/pull/184563