[clang] Fix WebKit static analyzers to support ref and deref methods to be defined on different classes. (PR #69985)

[Ryosuke Niwa via cfe-commits]

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@@ -77,14 +77,53 @@ class RefCntblBaseVirtualDtorChecker
               (AccSpec == AS_none && RD->isClass()))
             return false;
 
-          std::optional<const CXXRecordDecl*> RefCntblBaseRD = isRefCountable(Base);
-          if (!RefCntblBaseRD || !(*RefCntblBaseRD))
+          auto hasRefInBase = clang::hasPublicMethodInBase(Base, "ref");
+          auto hasDerefInBase = clang::hasPublicMethodInBase(Base, "deref");
+
+          bool hasRef = hasRefInBase && *hasRefInBase != nullptr;
+          bool hasDeref = hasDerefInBase && *hasDerefInBase != nullptr;
+
+          const Type *T = Base->getType().getTypePtrOrNull();
+          if (!T)
+            return false;
+
+          const CXXRecordDecl *C = T->getAsCXXRecordDecl();
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rniwa wrote:

Fixed.

https://github.com/llvm/llvm-project/pull/69985