Check if Member owner thread matches pointer thread and current thread

third_party/WebKit/Source/platform/heap/ThreadState.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 206 matching lines @@
         return reinterpret_cast<ThreadState*>(s_mainThreadStateStorage);
     }
 
     static ThreadState* fromObject(const void*);
 
     bool isMainThread() const { return this == mainThreadState(); }
 #if ENABLE(ASSERT)
     bool checkThread() const { return m_thread == currentThread(); }
 #endif
 
-    ThreadHeap& heap() { return *m_heap; }
+    ThreadHeap& heap() const { return *m_heap; }
 
     // When ThreadState is detaching from non-main thread its
     // heap is expected to be empty (because it is going away).
     // Perform registered cleanup tasks and garbage collection
     // to sweep away any objects that are left on this heap.
     // We assert that nothing must remain after this cleanup.
     // If assertion does not hold we crash as we are potentially
     // in the dangling pointer situation.
     void runTerminationGC();
 
@@ skipping 468 matching lines @@
 
 template<> class ThreadStateFor<AnyThread> {
     STATIC_ONLY(ThreadStateFor);
 public:
     static ThreadState* state() { return ThreadState::current(); }
 };
 
 } // namespace blink
 
 #endif // ThreadState_h