Oilpan: consistently allow allocation during finalization.

Source/platform/heap/Heap.cpp

Index: Source/platform/heap/Heap.cpp
diff --git a/Source/platform/heap/Heap.cpp b/Source/platform/heap/Heap.cpp
index 30ddefbc5e4bc7c610403645b3f24137f8b91be8..d4ab0e40432e6cf8f45c5157c92622073e1e2fce 100644
--- a/Source/platform/heap/Heap.cpp
+++ b/Source/platform/heap/Heap.cpp
@@ -368,7 +368,6 @@ void BaseHeap::poisonHeap(ObjectsToPoison objectsToPoison, Poisoning poisoning)
     //
     // Poisoning may be limited to unmarked objects only, or apply to all.
     if (poisoning == SetPoison) {
-        ASSERT(!m_firstPage);
         for (BasePage* page = m_firstUnsweptPage; page; page = page->next())
             page->poisonObjects(objectsToPoison, poisoning);
         return;