Revert of tcmalloc: Use C++11 atomics where appropriate.

third_party/tcmalloc/chromium/src/base/atomicops-internals-arm-generic.h

 // Copyright (c) 2003, 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 20 matching lines @@
 // Author: Lei Zhang, Sasha Levitskiy
 //
 // This file is an internal atomic implementation, use base/atomicops.h instead.
 //
 // LinuxKernelCmpxchg and Barrier_AtomicIncrement are from Google Gears.
 
 #ifndef BASE_ATOMICOPS_INTERNALS_ARM_GENERIC_H_
 #define BASE_ATOMICOPS_INTERNALS_ARM_GENERIC_H_
 
 #include <stdio.h>
-#include <stdlib.h>
+#include "base/abort.h"
 #include "base/basictypes.h"
 
 typedef int32_t Atomic32;
 
 namespace base {
 namespace subtle {
 
 typedef int64_t Atomic64;
 
 // 0xffff0fc0 is the hard coded address of a function provided by
@@ skipping 101 matching lines @@
   MemoryBarrier();
   return *ptr;
 }
 
 
 // 64-bit versions are not implemented yet.
 
 inline void NotImplementedFatalError(const char *function_name) {
   fprintf(stderr, "64-bit %s() not implemented on this platform\n",
           function_name);
-  abort();
+  tcmalloc::Abort();
 }
 
 inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr,
                                          Atomic64 old_value,
                                          Atomic64 new_value) {
   NotImplementedFatalError("NoBarrier_CompareAndSwap");
   return 0;
 }
 
 inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr,
@@ skipping 52 matching lines @@
                                        Atomic64 old_value,
                                        Atomic64 new_value) {
   NotImplementedFatalError("Atomic64 Release_CompareAndSwap");
   return 0;
 }
 
 }  // namespace base::subtle
 }  // namespace base
 
 #endif  // BASE_ATOMICOPS_INTERNALS_ARM_GENERIC_H_