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

ipc/BUILD.gn

 # 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.
 
 import("//testing/test.gni")
 
 component("ipc") {
   sources = [
     "attachment_broker.cc",
     "attachment_broker.h",
@@ skipping 64 matching lines @@
     "ipc_sync_message_filter.cc",
     "ipc_sync_message_filter.h",
     "message_filter.cc",
     "message_filter.h",
     "message_filter_router.cc",
     "message_filter_router.h",
     "param_traits_log_macros.h",
     "param_traits_macros.h",
     "param_traits_read_macros.h",
     "param_traits_write_macros.h",
-    "placeholder_brokerable_attachment.cc",
-    "placeholder_brokerable_attachment.h",
     "struct_constructor_macros.h",
     "struct_destructor_macros.h",
     "unix_domain_socket_util.cc",
     "unix_domain_socket_util.h",
   ]
 
   if (is_nacl) {
     sources -= [
       "ipc_channel.cc",
       "ipc_channel_posix.cc",
@@ skipping 38 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_message_generator.cc",
-      "ipc_test_message_generator.h",
-      "ipc_test_messages.h",
       "sync_socket_unittest.cc",
       "unix_domain_socket_util_unittest.cc",
     ]
 
     if (is_win || is_ios) {
       sources -= [ "unix_domain_socket_util_unittest.cc" ]
     }
 
     # TODO(brettw) hook up Android testing.
     #if (is_android && gtest_target_type == "shared_library") {
@@ skipping 62 matching lines @@
     "ipc_test_sink.cc",
     "ipc_test_sink.h",
   ]
   deps = [
     ":ipc",
     "//base",
     "//base/test:test_support",
     "//testing/gtest",
   ]
 }