Use one scoped_refptr.

webrtc/system_wrappers/system_wrappers.gyp

 # Copyright (c) 2012 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 21 matching lines @@
         'interface/event_wrapper.h',
         'interface/field_trial.h',
         'interface/file_wrapper.h',
         'interface/fix_interlocked_exchange_pointer_win.h',
         'interface/logcat_trace_context.h',
         'interface/logging.h',
         'interface/metrics.h',
         'interface/ref_count.h',
         'interface/rtp_to_ntp.h',
         'interface/rw_lock_wrapper.h',
-        'interface/scoped_refptr.h',
         'interface/scoped_vector.h',
         'interface/sleep.h',
         'interface/sort.h',
         'interface/static_instance.h',
         'interface/stl_util.h',
         'interface/stringize_macros.h',
         'interface/thread_wrapper.h',
         'interface/tick_util.h',
         'interface/timestamp_extrapolator.h',
         'interface/trace.h',
@@ skipping 165 matching lines @@
       'target_name': 'system_wrappers_default',
       'type': 'static_library',
       'dependencies': [
         'field_trial_default',
         'metrics_default',
       ]
     },
   ], # targets
 }