Revert of IPC: Add attachment brokering support to the message header.

ipc/ipc.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': [
     'ipc.gypi',
@@ skipping 41 matching lines @@
         'ipc_channel_reader_unittest.cc',
         'ipc_channel_unittest.cc',
         'ipc_fuzzing_tests.cc',
         'ipc_message_attachment_set_posix_unittest.cc',
         'ipc_message_unittest.cc',
         'ipc_message_utils_unittest.cc',
         'ipc_send_fds_test.cc',
         'ipc_sync_channel_unittest.cc',
         'ipc_sync_message_unittest.cc',
         'ipc_sync_message_unittest.h',
-        'ipc_test_messages.h',
-        'ipc_test_message_generator.cc',
-        'ipc_test_message_generator.h',
         'run_all_unittests.cc',
         'sync_socket_unittest.cc',
         'unix_domain_socket_util_unittest.cc',
       ],
       'conditions': [
         ['OS == "win" or OS == "ios"', {
           'sources!': [
             'unix_domain_socket_util_unittest.cc',
           ],
         }],
@@ skipping 143 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'ipc_tests.isolate',
           ],
         },
       ],
     }],
   ],
 }