Oilpan: consistently allow allocation during finalization.

Source/platform/heap/Heap.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 350 matching lines @@
     // TODO(sof): support complete poisoning of all heaps.
     ASSERT(objectsToPoison != MarkedAndUnmarked || heapIndex() == EagerSweepHeapIndex);
 
     // This method may either be called to poison (SetPoison) heap
     // object payloads prior to sweeping, or it may be called at
     // the completion of a sweep to unpoison (ClearPoison) the
     // objects remaining in the heap. Those will all be live and unmarked.
     //
     // 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;
     }
     // Support clearing of poisoning after sweeping has completed,
     // in which case the pages of the live objects are reachable
     // via m_firstPage.
     ASSERT(!m_firstUnsweptPage);
     for (BasePage* page = m_firstPage; page; page = page->next())
         page->poisonObjects(objectsToPoison, poisoning);
@@ skipping 1901 matching lines @@
 size_t Heap::s_allocatedObjectSize = 0;
 size_t Heap::s_allocatedSpace = 0;
 size_t Heap::s_markedObjectSize = 0;
 // We don't want to use 0 KB for the initial value because it may end up
 // triggering the first GC of some thread too prematurely.
 size_t Heap::s_estimatedLiveObjectSize = 512 * 1024;
 size_t Heap::s_externalObjectSizeAtLastGC = 0;
 double Heap::s_estimatedMarkingTimePerByte = 0.0;
 
 } // namespace blink