Fix a bunch of IWYU violators that don't include scoped_ptr.h

ipc/unix_domain_socket_util_unittest.cc

 // 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.
 
 #include <stddef.h>
 #include <sys/socket.h>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "ipc/unix_domain_socket_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
@@ skipping 144 matching lines @@
       HANDLE_EINTR(send(connection.client_fd(), buffer, buf_len, 0));
   ASSERT_EQ(buf_len, sent_bytes);
   char recv_buf[sizeof(buffer)];
   size_t received_bytes =
       HANDLE_EINTR(recv(connection.server_fd(), recv_buf, buf_len, 0));
   ASSERT_EQ(buf_len, received_bytes);
   ASSERT_EQ(0, memcmp(recv_buf, buffer, buf_len));
 }
 
 }  // namespace