[cleanup] Don't cast ScopeInfo twice in inferred_name()

Change-Id: Id34b9dbe07871fc8e25bcb73d908b5b155a9f4e9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1571407
Auto-Submit: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60905}

src/objects/shared-function-info-inl.h

@@ -710,7 +710,7 @@ String SharedFunctionInfo::inferred_name() {
   if (maybe_scope_info->IsScopeInfo()) {
     ScopeInfo scope_info = ScopeInfo::cast(maybe_scope_info);
     if (scope_info->HasInferredFunctionName()) {
-      Object name = ScopeInfo::cast(maybe_scope_info)->InferredFunctionName();
+      Object name = scope_info->InferredFunctionName();
       if (name->IsString()) return String::cast(name);
     }
   } else if (HasUncompiledData()) {