Revert "third_party/protobuf: Update to HEAD (83d681ee2c)"

third_party/protobuf/src/google/protobuf/stubs/atomicops_internals_tsan.h

 // Protocol Buffers - Google's data interchange format
 // Copyright 2013 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // 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.
@@ skipping 188 matching lines @@
 
 inline Atomic64 Release_CompareAndSwap(volatile Atomic64 *ptr,
                                        Atomic64 old_value,
                                        Atomic64 new_value) {
   Atomic64 cmp = old_value;
   __tsan_atomic64_compare_exchange_strong(ptr, &cmp, new_value,
       __tsan_memory_order_release, __tsan_memory_order_relaxed);
   return cmp;
 }
 
-inline void MemoryBarrierInternal() {
+inline void MemoryBarrier() {
   __tsan_atomic_thread_fence(__tsan_memory_order_seq_cst);
 }
 
 }  // namespace internal
 }  // namespace protobuf
 }  // namespace google
 
 #undef ATOMICOPS_COMPILER_BARRIER
 
 #endif  // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_TSAN_H_