Replace RefCountImpl with rtc::RefCountedObject.

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 17 matching lines @@
         'include/data_log_c.h',
         'include/data_log_impl.h',
         'include/event_wrapper.h',
         'include/field_trial.h',
         'include/file_wrapper.h',
         'include/fix_interlocked_exchange_pointer_win.h',
         'include/logcat_trace_context.h',
         'include/logging.h',
         'include/metrics.h',
         'include/ntp_time.h',
-        'include/ref_count.h',
         'include/rtp_to_ntp.h',
         'include/rw_lock_wrapper.h',
         'include/scoped_vector.h',
         'include/sleep.h',
         'include/sort.h',
         'include/static_instance.h',
         'include/stl_util.h',
         'include/stringize_macros.h',
         'include/tick_util.h',
         'include/timestamp_extrapolator.h',
@@ skipping 135 matching lines @@
       'type': 'static_library',
       'dependencies': [
         'system_wrappers',
         'field_trial_default',
         'metrics_default',
       ]
     },
   ], # targets
 }