Remove the TRACE_EVENT_*_ETW macros.

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/java_heap_dump_provider_android.cc',
       'trace_event/java_heap_dump_provider_android.h',
       'trace_event/memory_allocator_dump.cc',
       'trace_event/memory_allocator_dump.h',
@@ skipping 35 matching lines @@
       'trace_event/trace_event_impl.cc',
       'trace_event/trace_event_impl.h',
       'trace_event/trace_event_memory.cc',
       'trace_event/trace_event_memory.h',
       'trace_event/trace_event_memory_overhead.cc',
       'trace_event/trace_event_memory_overhead.h',
       'trace_event/trace_event_synthetic_delay.cc',
       'trace_event/trace_event_synthetic_delay.h',
       'trace_event/trace_event_system_stats_monitor.cc',
       'trace_event/trace_event_system_stats_monitor.h',
-      'trace_event/trace_event_win.cc',
-      'trace_event/trace_event_win.h',
       'trace_event/trace_log.cc',
       'trace_event/trace_log.h',
       'trace_event/trace_log_constants.cc',
       'trace_event/trace_sampling_thread.cc',
       'trace_event/trace_sampling_thread.h',
       'trace_event/winheap_dump_provider_win.cc',
       'trace_event/winheap_dump_provider_win.h',
     ],
     'trace_event_test_sources' : [
       '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/memory_profiler_allocation_context_unittest.cc',
       'trace_event/memory_profiler_allocation_register_unittest.cc',
       'trace_event/process_memory_dump_unittest.cc',
       'trace_event/process_memory_totals_dump_provider_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_memory_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/trace_event_win_unittest.cc',
       'trace_event/winheap_dump_provider_win_unittest.cc',
     ],
     'conditions': [
       ['OS == "linux" or OS == "android"', {
           'trace_event_sources': [
             'trace_event/malloc_dump_provider.cc',
             'trace_event/malloc_dump_provider.h',
             'trace_event/process_memory_maps_dump_provider.cc',
           ],
           'trace_event_test_sources' : [
             'trace_event/process_memory_maps_dump_provider_unittest.cc',
           ],
       }],
     ],
   },
 }