Add chrome crash service to GN build on Windows.

components/crash.gypi

 # Copyright 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.
 
 {
   'targets': [
     {
       # GN version: //components/crash/core/browser
       'target_name': 'crash_core_browser',
       'type': 'static_library',
@@ skipping 327 matching lines @@
                 '../breakpad/breakpad.gyp:breakpad_sender_win64',
                 '../sandbox/sandbox.gyp:sandbox_win64',
               ],
               'configurations': {
                 'Common_Base': {
                   'msvs_target_platform': 'x64',
                 },
               },
             },
             {
+              # GN version: //components/crash/content/tools:crash_service
               'target_name': 'breakpad_crash_service_win64',
               'type': 'static_library',
               'dependencies': [
                 '../base/base.gyp:base_win64',
                 '../breakpad/breakpad.gyp:breakpad_handler_win64',
                 '../breakpad/breakpad.gyp:breakpad_sender_win64',
               ],
               'sources': [
                 'crash/content/tools/crash_service.cc',
                 'crash/content/tools/crash_service.h',
@@ skipping 54 matching lines @@
                   ],
                 }],
               ],
             },
           ],
         }],
       ],
     }],
   ],
 }