Remove the TRACE_EVENT_*_ETW macros.

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 = [
     "java_heap_dump_provider_android.cc",
     "java_heap_dump_provider_android.h",
     "memory_allocator_dump.cc",
     "memory_allocator_dump.h",
@@ skipping 35 matching lines @@
     "trace_event_impl.cc",
     "trace_event_impl.h",
     "trace_event_memory.cc",
     "trace_event_memory.h",
     "trace_event_memory_overhead.cc",
     "trace_event_memory_overhead.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",
-    "trace_event_win.h",
     "trace_log.cc",
     "trace_log.h",
     "trace_log_constants.cc",
     "trace_sampling_thread.cc",
     "trace_sampling_thread.h",
     "winheap_dump_provider_win.cc",
     "winheap_dump_provider_win.h",
   ]
 
   if (is_nacl) {
@@ skipping 44 matching lines @@
     "memory_profiler_allocation_register_unittest.cc",
     "process_memory_dump_unittest.cc",
     "process_memory_totals_dump_provider_unittest.cc",
     "trace_config_memory_test_util.h",
     "trace_config_unittest.cc",
     "trace_event_argument_unittest.cc",
     "trace_event_memory_unittest.cc",
     "trace_event_synthetic_delay_unittest.cc",
     "trace_event_system_stats_monitor_unittest.cc",
     "trace_event_unittest.cc",
-    "trace_event_win_unittest.cc",
     "winheap_dump_provider_win_unittest.cc",
   ]
 
   if (is_linux || is_android) {
     sources += [ "process_memory_maps_dump_provider_unittest.cc" ]
   }
 
   deps = [
     "//base/test:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }