Remove SafePointBarrier

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 130 matching lines @@
 }
 
 void ThreadHeapStats::decreaseAllocatedSpace(size_t delta) {
   atomicSubtract(&m_allocatedSpace, static_cast<long>(delta));
   ProcessHeap::decreaseTotalAllocatedSpace(delta);
 }
 
 ThreadHeap::ThreadHeap()
     : m_regionTree(WTF::makeUnique<RegionTree>()),
       m_heapDoesNotContainCache(WTF::wrapUnique(new HeapDoesNotContainCache)),
-      m_safePointBarrier(WTF::makeUnique<SafePointBarrier>()),
       m_freePagePool(WTF::wrapUnique(new PagePool)),
       m_markingStack(CallbackStack::create()),
       m_postMarkingCallbackStack(CallbackStack::create()),
       m_globalWeakCallbackStack(CallbackStack::create()),
       m_ephemeronStack(CallbackStack::create()) {
   if (ThreadState::current()->isMainThread())
     s_mainThreadHeap = this;
 }
 
 ThreadHeap::~ThreadHeap() {
@@ skipping 370 matching lines @@
     state->visitPersistents(visitor);
 }
 
 void ThreadHeap::visitStackRoots(Visitor* visitor) {
   ASSERT(ThreadState::current()->isInGC());
   TRACE_EVENT0("blink_gc", "ThreadHeap::visitStackRoots");
   for (ThreadState* state : m_threads)
     state->visitStack(visitor);
 }
 
-void ThreadHeap::enterSafePoint(ThreadState* threadState) {
-  m_safePointBarrier->enterSafePoint(threadState);
-}
-
-void ThreadHeap::leaveSafePoint() {
-  m_safePointBarrier->leaveSafePoint();
-}
-
 BasePage* ThreadHeap::lookupPageForAddress(Address address) {
   ASSERT(ThreadState::current()->isInGC());
   if (PageMemoryRegion* region = m_regionTree->lookup(address)) {
     return region->pageFromAddress(address);
   }
   return nullptr;
 }
 
 void ThreadHeap::resetHeapCounters() {
   ASSERT(ThreadState::current()->isInGC());
 
   ThreadHeap::reportMemoryUsageForTracing();
 
   ProcessHeap::decreaseTotalAllocatedObjectSize(m_stats.allocatedObjectSize());
   ProcessHeap::decreaseTotalMarkedObjectSize(m_stats.markedObjectSize());
 
   m_stats.reset();
   for (ThreadState* state : m_threads)
     state->resetHeapCounters();
 }
 
 ThreadHeap* ThreadHeap::s_mainThreadHeap = nullptr;
 
 }  // namespace blink