Allow CrossThreadPersistent in collections

third_party/WebKit/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 308 matching lines @@
 
 #if !ENABLE(ASSERT)
     if (m_heapDoesNotContainCache->lookup(address))
         return nullptr;
 #endif
 
     if (BasePage* page = lookupPageForAddress(address)) {
         ASSERT(page->contains(address));
         ASSERT(!page->orphaned());
         ASSERT(!m_heapDoesNotContainCache->lookup(address));
+        DCHECK(&visitor->heap() == &page->arena()->getThreadState()->heap());
         page->checkAndMarkPointer(visitor, address);
         return address;
     }
 
 #if !ENABLE(ASSERT)
     m_heapDoesNotContainCache->addEntry(address);
 #else
     if (!m_heapDoesNotContainCache->lookup(address))
         m_heapDoesNotContainCache->addEntry(address);
 #endif
@@ skipping 444 matching lines @@
     ProcessHeap::decreaseTotalMarkedObjectSize(m_stats.markedObjectSize());
 
     m_stats.reset();
     for (ThreadState* state : m_threads)
         state->resetHeapCounters();
 }
 
 ThreadHeap* ThreadHeap::s_mainThreadHeap = nullptr;
 
 } // namespace blink