Do not fire timers for finalizing objects.

Source/platform/heap/ThreadState.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 296 matching lines @@
     , m_persistents(adoptPtr(new PersistentAnchor()))
     , m_startOfStack(reinterpret_cast<intptr_t*>(getStackStart()))
     , m_endOfStack(reinterpret_cast<intptr_t*>(getStackStart()))
     , m_safePointScopeMarker(nullptr)
     , m_atSafePoint(false)
     , m_interruptors()
     , m_didV8GCAfterLastGC(false)
     , m_sweepForbidden(false)
     , m_noAllocationCount(0)
     , m_isTerminating(false)
+    , m_lazySweepToggle(false)
     , m_shouldFlushHeapDoesNotContainCache(false)
     , m_collectionRate(1.0)
     , m_gcState(NoGCScheduled)
     , m_traceDOMWrappers(nullptr)
 #if defined(ADDRESS_SANITIZER)
     , m_asanFakeStack(__asan_get_current_fake_stack())
 #endif
 {
     checkThread();
     ASSERT(!**s_threadSpecific);
@@ skipping 572 matching lines @@
     }
 }
 
 void ThreadState::preGC()
 {
     ASSERT(!isInGC());
     setGCState(GCRunning);
     makeConsistentForSweeping();
     prepareRegionTree();
     flushHeapDoesNotContainCacheIfNeeded();
+    m_lazySweepToggle = !m_lazySweepToggle;
     if (isMainThread())
         m_allocatedObjectSizeBeforeGC = Heap::allocatedObjectSize() + Heap::markedObjectSize();
 }
 
 void ThreadState::postGC(GCType gcType)
 {
     ASSERT(isInGC());
     setGCState(gcType == GCWithSweep ? EagerSweepScheduled : LazySweepScheduled);
     for (int i = 0; i < NumberOfHeaps; i++)
         m_heaps[i]->prepareForSweep();
@@ skipping 256 matching lines @@
             return gcInfo;
         }
     }
     if (needLockForIteration)
         threadAttachMutex().unlock();
     return nullptr;
 }
 #endif
 
 } // namespace blink