Use C++11 atomics

third_party/protobuf/protobuf_lite.gypi

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'sources': [
     'src/google/protobuf/stubs/atomicops.h',
     'src/google/protobuf/stubs/atomicops_internals_arm_gcc.h',
     'src/google/protobuf/stubs/atomicops_internals_atomicword_compat.h',
     'src/google/protobuf/stubs/atomicops_internals_macosx.h',
     'src/google/protobuf/stubs/atomicops_internals_mips_gcc.h',
-    'src/google/protobuf/stubs/atomicops_internals_x86_gcc.cc',
     'src/google/protobuf/stubs/atomicops_internals_x86_gcc.h',
     'src/google/protobuf/stubs/atomicops_internals_x86_msvc.cc',
     'src/google/protobuf/stubs/atomicops_internals_x86_msvc.h',
     'src/google/protobuf/stubs/common.h',
     'src/google/protobuf/stubs/once.h',
     'src/google/protobuf/stubs/platform_macros.h',
     'src/google/protobuf/extension_set.h',
     'src/google/protobuf/generated_message_util.h',
     'src/google/protobuf/message_lite.h',
     'src/google/protobuf/repeated_field.h',
@@ skipping 36 matching lines @@
       'src',
     ],
     'defines': [
       'GOOGLE_PROTOBUF_NO_RTTI',
       'GOOGLE_PROTOBUF_NO_STATIC_INITIALIZER',
     ],
     # TODO(jschuh): http://crbug.com/167187 size_t -> int.
     'msvs_disabled_warnings': [ 4267 ],
   },
 }