Add tracing AutoOpenCloseEvent.

base/trace_event/trace_event.gypi

 # Copyright 2015 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.
 {
   'variables': {
     'trace_event_sources' : [
       'trace_event/blame_context.cc',
       'trace_event/blame_context.h',
       'trace_event/common/trace_event_common.h',
       'trace_event/heap_profiler.h',
@@ skipping 63 matching lines @@
     'trace_event_test_sources' : [
       'trace_event/blame_context_unittest.cc',
       'trace_event/heap_profiler_allocation_context_tracker_unittest.cc',
       'trace_event/heap_profiler_allocation_register_unittest.cc',
       'trace_event/heap_profiler_heap_dump_writer_unittest.cc',
       'trace_event/heap_profiler_stack_frame_deduplicator_unittest.cc',
       'trace_event/heap_profiler_type_name_deduplicator_unittest.cc',
       'trace_event/java_heap_dump_provider_android_unittest.cc',
       'trace_event/memory_allocator_dump_unittest.cc',
       'trace_event/memory_dump_manager_unittest.cc',
+      'trace_event/persistent_async_event_unittest.cc',
       'trace_event/process_memory_dump_unittest.cc',
       'trace_event/trace_config_memory_test_util.h',
       'trace_event/trace_config_unittest.cc',
       'trace_event/trace_event_argument_unittest.cc',
       'trace_event/trace_event_synthetic_delay_unittest.cc',
       'trace_event/trace_event_system_stats_monitor_unittest.cc',
       'trace_event/trace_event_unittest.cc',
       'trace_event/winheap_dump_provider_win_unittest.cc',
     ],
     'conditions': [
       ['OS == "linux" or OS=="android" or OS=="mac" or OS=="ios"', {
         'trace_event_sources': [
           'trace_event/malloc_dump_provider.cc',
           'trace_event/malloc_dump_provider.h',
         ],
       }],
       ['OS == "android"', {
         'trace_event_test_sources' : [
           'trace_event/trace_event_android_unittest.cc',
         ],
       }],
     ],
   },
 }