Build SharedExclusiveLock in Chromium.

webrtc/base/base.gyp

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
   'includes': [ '../build/common.gypi', ],
@@ skipping 481 matching lines @@
             'profiler.cc',
             'profiler.h',
             'proxyserver.cc',
             'proxyserver.h',
             'referencecountedsingletonfactory.h',
             'rollingaccumulator.h',
             'safe_conversions.h',
             'safe_conversions_impl.h',
             'scopedptrcollection.h',
             'sec_buffer.h',
-            'sharedexclusivelock.cc',
-            'sharedexclusivelock.h',
             'sslconfig.h',
             'sslroots.h',
             'testbase64.h',
             'testclient.cc',
             'testclient.h',
             'transformadapter.cc',
             'transformadapter.h',
             'versionparsing.cc',
             'versionparsing.h',
             'virtualsocketserver.cc',
@@ skipping 230 matching lines @@
     },
     {
      'target_name': 'gtest_prod',
       'type': 'static_library',
       'sources': [
         'gtest_prod_util.h',
       ],
     },
   ],
 }