Don't DCHECK that the weak closure wasn't yet overapproximated

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 1b0ab092f04da91374cb07f7d8b46da18aa75e49..054ebced2a899ff2d20941a4d4b76638de122f8a 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -736,8 +736,9 @@ void Heap::HandleGCRequest() {
     return;
   }
   DCHECK(FLAG_overapproximate_weak_closure);
-  DCHECK(!incremental_marking()->weak_closure_was_overapproximated());
-  OverApproximateWeakClosure("GC interrupt");
+  if (!incremental_marking()->weak_closure_was_overapproximated()) {
+    OverApproximateWeakClosure("GC interrupt");
+  }
 }