[heap] Enable verification of evacuation for old space

src/heap/mark-compact.cc

Index: src/heap/mark-compact.cc
diff --git a/src/heap/mark-compact.cc b/src/heap/mark-compact.cc
index 0a372f866f54dd1af80e6e75b0e033c24d3b0848..19b2eb66992874cfa24e6a5fb9e545d1a68178f6 100644
--- a/src/heap/mark-compact.cc
+++ b/src/heap/mark-compact.cc
@@ -254,9 +254,6 @@ void EvacuationVerifier::VerifyEvacuation(NewSpace* space) {
 }
 
 void EvacuationVerifier::VerifyEvacuation(PagedSpace* space) {
-  if (FLAG_use_allocation_folding && (space == heap_->old_space())) {
-    return;
-  }
   for (Page* p : *space) {
     if (p->IsEvacuationCandidate()) continue;
     if (p->Contains(space->top()))