Add option to export tracing events to ETW.

base/trace_event/BUILD.gn

 # 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.
 
 source_set("trace_event") {
   sources = [
     "memory_allocator_attributes.h",
     "memory_allocator_dump.cc",
     "memory_allocator_dump.h",
     "memory_dump_manager.cc",
     "memory_dump_manager.h",
     "memory_dump_provider.cc",
     "memory_dump_provider.h",
     "process_memory_dump.cc",
     "process_memory_dump.h",
     "process_memory_maps.cc",
     "process_memory_maps.h",
     "process_memory_maps_dump_provider.cc",
     "process_memory_maps_dump_provider.h",
     "process_memory_totals.cc",
     "process_memory_totals.h",
     "process_memory_totals_dump_provider.cc",
     "process_memory_totals_dump_provider.h",
     "trace_event.h",
     "trace_event_android.cc",
     "trace_event_argument.cc",
     "trace_event_argument.h",
+    "trace_event_etw_export_win.cc",
+    "trace_event_etw_export_win.h",
     "trace_event_impl.cc",
     "trace_event_impl.h",
     "trace_event_impl_constants.cc",
     "trace_event_memory.cc",
     "trace_event_memory.h",
     "trace_event_synthetic_delay.cc",
     "trace_event_synthetic_delay.h",
     "trace_event_system_stats_monitor.cc",
     "trace_event_system_stats_monitor.h",
     "trace_event_win.cc",
@@ skipping 10 matching lines @@
   configs += [ "//base:base_implementation" ]
 
   deps = [
     "//base/debug",
     "//base/json",
     "//base/memory",
     "//base/process",
     "//base/third_party/dynamic_annotations",
   ]
 
+  if (is_win) {
+    deps += [ "//base/trace_event/etw_manifest:chrome_events_win" ]
+  }
+
   allow_circular_includes_from = [
     "//base/debug",
     "//base/memory",
     "//base/process",
   ]
 
   visibility = [ "//base/*" ]
 }
 
 source_set("trace_event_unittests") {
@@ skipping 10 matching lines @@
     "trace_event_unittest.cc",
     "trace_event_win_unittest.cc",
   ]
 
   deps = [
     "//base/test:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }