Implement a Windows crash client registrar.

handler/handler_test.gyp

 # Copyright 2015 The Crashpad Authors. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 18 matching lines @@
             '../test/test.gyp:crashpad_test',
             '../third_party/gtest/gtest.gyp:gtest',
             '../third_party/gtest/gtest.gyp:gtest_main',
             '../third_party/mini_chromium/mini_chromium.gyp:base',
             '../util/util.gyp:crashpad_util',
           ],
           'include_dirs': [
             '..',
           ],
           'sources': [
+            'win/registrar_test.cc',
             'win/registration_pipe_state_test.cc',
             'win/registration_server_test.cc',
             'win/registration_test_base.cc',
             'win/registration_test_base.h',
           ],
         },
       ],
     }],
   ],
 }