Force full GC whenever CollectAllGarbage is meant to trigger a full GC.

src/heap/mark-compact-inl.h

Index: src/heap/mark-compact-inl.h
diff --git a/src/heap/mark-compact-inl.h b/src/heap/mark-compact-inl.h
index fe32df01485a934df955ebbbd455c82ee77b8d8b..6b12973b9d5b57b9de6ce36c2500f99297751d4c 100644
--- a/src/heap/mark-compact-inl.h
+++ b/src/heap/mark-compact-inl.h
@@ -23,6 +23,9 @@ void MarkCompactCollector::SetFlags(int flags) {
   reduce_memory_footprint_ = ((flags & Heap::kReduceMemoryFootprintMask) != 0);
   abort_incremental_marking_ =
       ((flags & Heap::kAbortIncrementalMarkingMask) != 0);
+  finalize_incremental_marking_ =
+      ((flags & Heap::kFinalizeIncrementalMarkingMask) != 0);
+  DCHECK(!finalize_incremental_marking_ || !abort_incremental_marking_);
 }