Add option to export tracing events to ETW.

base/base.gyp

 # Copyright (c) 2012 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': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 671 matching lines @@
       'dependencies': [
         'base',
         'base_i18n',
         'base_message_loop_tests',
         'base_prefs',
         'base_prefs_test_support',
         'base_static',
         'run_all_unittests',
         'test_support_base',
         'third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
+        'trace_event/etw_manifest/etw_manifest.gyp:etw_manifest',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../third_party/icu/icu.gyp:icui18n',
         '../third_party/icu/icu.gyp:icuuc',
       ],
       'includes': ['../build/nocompile.gypi'],
       'variables': {
          # TODO(ajwong): Is there a way to autodetect this?
         'module_dir': 'base'
       },
@@ skipping 876 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }