Remove old system_wrappers event_tracer.h.

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 10 matching lines @@
         'include/aligned_malloc.h',
         'include/atomic32.h',
         'include/clock.h',
         'include/condition_variable_wrapper.h',
         'include/cpu_info.h',
         'include/cpu_features_wrapper.h',
         'include/critical_section_wrapper.h',
         'include/data_log.h',
         'include/data_log_c.h',
         'include/data_log_impl.h',
-        'include/event_tracer.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/ref_count.h',
         'include/rtp_to_ntp.h',
         'include/rw_lock_wrapper.h',
@@ skipping 28 matching lines @@
         'source/critical_section_win.cc',
         'source/critical_section_win.h',
         'source/data_log.cc',
         'source/data_log_c.cc',
         'source/data_log_no_op.cc',
         'source/event.cc',
         'source/event_timer_posix.cc',
         'source/event_timer_posix.h',
         'source/event_timer_win.cc',
         'source/event_timer_win.h',
-        'source/event_tracer.cc',
         'source/file_impl.cc',
         'source/file_impl.h',
         'source/logcat_trace_context.cc',
         'source/logging.cc',
         'source/rtp_to_ntp.cc',
         'source/rw_lock.cc',
         'source/rw_lock_generic.cc',
         'source/rw_lock_generic.h',
         'source/rw_lock_posix.cc',
         'source/rw_lock_posix.h',
@@ skipping 120 matching lines @@
       'type': 'static_library',
       'dependencies': [
         'system_wrappers',
         'field_trial_default',
         'metrics_default',
       ]
     },
   ], # targets
 }