Add tracing AutoOpenCloseEvent.

base/BUILD.gn

 # Copyright (c) 2013 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.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 877 matching lines @@
     "time/time_win.cc",
     "timer/elapsed_timer.cc",
     "timer/elapsed_timer.h",
     "timer/hi_res_timer_manager.h",
     "timer/hi_res_timer_manager_posix.cc",
     "timer/hi_res_timer_manager_win.cc",
     "timer/mock_timer.cc",
     "timer/mock_timer.h",
     "timer/timer.cc",
     "timer/timer.h",
+    "trace_event/auto_open_close_event.cc",
+    "trace_event/auto_open_close_event.h",
     "trace_event/blame_context.cc",
     "trace_event/blame_context.h",
     "trace_event/common/trace_event_common.h",
     "trace_event/heap_profiler.h",
     "trace_event/heap_profiler_allocation_context.cc",
     "trace_event/heap_profiler_allocation_context.h",
     "trace_event/heap_profiler_allocation_context_tracker.cc",
     "trace_event/heap_profiler_allocation_context_tracker.h",
     "trace_event/heap_profiler_allocation_register.cc",
     "trace_event/heap_profiler_allocation_register.h",
@@ skipping 1546 matching lines @@
     testonly = true
     deps = [
       ":base_java",
     ]
     java_files = [
       "test/android/java/src/org/chromium/base/ContentUriTestUtils.java",
       "test/android/java/src/org/chromium/base/TestSystemMessageHandler.java",
     ]
   }
 }