Remove ThreadState::m_isAtSafePoint

third_party/WebKit/Source/platform/heap/Heap.h

 /*
  * 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 215 matching lines @@
  public:
   ThreadHeap();
   ~ThreadHeap();
 
   // Returns true for main thread's heap.
   // TODO(keishi): Per-thread-heap will return false.
   bool isMainThreadHeap() { return this == ThreadHeap::mainThreadHeap(); }
   static ThreadHeap* mainThreadHeap() { return s_mainThreadHeap; }
 
 #if DCHECK_IS_ON()
-  bool isAtSafePoint();
   BasePage* findPageFromAddress(Address);
 #endif
 
   template <typename T>
   static inline bool isHeapObjectAlive(const T* object) {
     static_assert(sizeof(T), "T must be fully defined");
     // The strongification of collections relies on the fact that once a
     // collection has been strongified, there is no way that it can contain
     // non-live entries, so no entries will be removed. Since you can't set
     // the mark bit on a null pointer, that means that null pointers are
@@ skipping 436 matching lines @@
   T** cell = reinterpret_cast<T**>(object);
   if (*cell && !ObjectAliveTrait<T>::isHeapObjectAlive(*cell))
     *cell = nullptr;
 }
 
 }  // namespace blink
 
 #include "platform/heap/VisitorImpl.h"
 
 #endif  // Heap_h