Reapplies all the IPC system work (reverts the revert r56272).

ipc/ipc_send_fds_test.cc

 // Copyright (c) 2009 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.
 
 #include "build/build_config.h"
 
 #include "ipc/ipc_tests.h"
 
 #if defined(OS_MACOSX)
 extern "C" {
 #include <sandbox.h>
 }
 #endif
 #include <fcntl.h>
 #include <sys/stat.h>
 
 #include "base/eintr_wrapper.h"
 #include "base/message_loop.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_message_utils.h"
 
 #if defined(OS_POSIX)
+#include "base/file_descriptor_posix.h"
 
 namespace {
 
 const unsigned kNumFDsToSend = 20;
 const char* kDevZeroPath = "/dev/zero";
 
 static void VerifyAndCloseDescriptor(int fd, ino_t inode_num) {
   // Check that we can read from the FD.
   char buf;
   ssize_t amt_read = read(fd, &buf, 1);
@@ skipping 145 matching lines @@
   IPC::Channel chan(kTestClientChannel, IPC::Channel::MODE_SERVER,
                     &listener);
   chan.Connect();
 
   base::ProcessHandle process_handle = SpawnChild(TEST_DESCRIPTOR_CLIENT,
                                                   &chan);
   TestDescriptorServer(chan, process_handle);
 }
 
 #endif  // defined(OS_POSIX)