[clang] [webkit.UncountedLambdaCapturesChecker] Ignore a lambda which gets called immediately (PR #162977)

[Ryosuke Niwa via cfe-commits]

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@@ -343,6 +343,16 @@ class RawPtrRefLambdaCapturesChecker
         auto *Callee = CE->getCallee();
         if (!Callee)
           return;
+        Callee = Callee->IgnoreParenCasts();
+        if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(Callee))
+          Callee = MTE->getSubExpr();
+        if (!Callee)
+          return;
+        Callee = Callee->IgnoreParenCasts();
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rniwa wrote:

I think this is needed in the case we do: `Callee = MTE->getSubExpr();` in line 348. I'll move this and null check for `Callee` inside the if statement for clarity.

https://github.com/llvm/llvm-project/pull/162977