Revert of [heap] Remove eager shortcut in JSFunction visitor.

src/heap/objects-visiting-inl.h

Index: src/heap/objects-visiting-inl.h
diff --git a/src/heap/objects-visiting-inl.h b/src/heap/objects-visiting-inl.h
index 1851b66651f4962a0ccedc695e62d616a62b45ed..ddfae0e59587eb134989078cb89ed96ba57174f3 100644
--- a/src/heap/objects-visiting-inl.h
+++ b/src/heap/objects-visiting-inl.h
@@ -494,6 +494,14 @@
       // non-flushable, because it is required for bailing out from
       // optimized code.
       collector->code_flusher()->AddCandidate(function);
+      // Visit shared function info immediately to avoid double checking
+      // of its flushability later. This is just an optimization because
+      // the shared function info would eventually be visited.
+      SharedFunctionInfo* shared = function->shared();
+      if (StaticVisitor::MarkObjectWithoutPush(heap, shared)) {
+        StaticVisitor::MarkObject(heap, shared->map());
+        VisitSharedFunctionInfoWeakCode(heap, shared);
+      }
       // Treat the reference to the code object weakly.
       VisitJSFunctionWeakCode(map, object);
       return;