heap: Fix scheduling tasks when delaying marking

Delaying marking requires tasks to be scheduled.

Bug: chromium:1054398
Change-Id: Ib92a0f5541f0e37cbbabfb3dd8185b56680d0142
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2066977Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66376}

src/heap/incremental-marking.cc

@@ -823,9 +823,8 @@ void IncrementalMarking::MarkingComplete(CompletionAction action) {
               "allowed overshoot: %fms\n",
               time_to_marking_task, overshoot_ms);
         }
-        // Assuming kAllowedOvershoot > 0.
-        DCHECK(incremental_marking_job_.IsTaskPending(
-            IncrementalMarkingJob::TaskType::kNormal));
+        incremental_marking_job_.ScheduleTask(
+            heap(), IncrementalMarkingJob::TaskType::kNormal);
         return;
       }
     }