Remove RenderThreadImpl::Shutdown

third_party/WebKit/Source/wtf/ThreadSpecific.h

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Jian Li <jianli@chromium.org>
  * Copyright (C) 2012 Patrick Gansterer <paroga@paroga.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 206 matching lines @@
   data->destructor = &ThreadSpecific<T>::destroy;
   TlsSetValue(tlsKeys()[m_index], data);
 }
 
 #else
 #error ThreadSpecific is not implemented for this platform.
 #endif
 
 template <typename T>
 inline void ThreadSpecific<T>::destroy(void* ptr) {
-  if (isShutdown())
+  // Never call destructors on the main thread.
+  // This is fine because Blink no longer has a graceful shutdown sequence.
+  if (isMainThread())
     return;
 
   Data* data = static_cast<Data*>(ptr);
 
 #if OS(POSIX)
   // We want get() to keep working while data destructor works, because it can
   // be called indirectly by the destructor.  Some pthreads implementations
   // zero out the pointer before calling destroy(), so we temporarily reset it.
   pthread_setspecific(data->owner->m_key, ptr);
 #endif
@@ skipping 40 matching lines @@
 template <typename T>
 inline T& ThreadSpecific<T>::operator*() {
   return *operator T*();
 }
 
 }  // namespace WTF
 
 using WTF::ThreadSpecific;
 
 #endif  // WTF_ThreadSpecific_h