Linux sandbox: always restrict clone() in baseline policy.

sandbox/linux/tests/unit_tests.cc

 // 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.
 
 #include <fcntl.h>
 #include <poll.h>
 #include <signal.h>
 #include <stdio.h>
 #include <sys/resource.h>
 #include <sys/time.h>
 #include <time.h>
 #include <unistd.h>
 
 #include "base/file_util.h"
+#include "base/posix/eintr_wrapper.h"
 #include "base/third_party/valgrind/valgrind.h"
 #include "build/build_config.h"
 #include "sandbox/linux/tests/unit_tests.h"
 
 namespace {
 std::string TestFailedMessage(const std::string& msg) {
   return msg.empty() ? std::string() : "Actual test failure: " + msg;
 }
 
 int GetSubProcessTimeoutTimeInSeconds() {
@@ skipping 266 matching lines @@
   fflush(stderr);
   _exit(kExitWithAssertionFailure);
 }
 
 void UnitTests::IgnoreThisTest() {
   fflush(stderr);
   _exit(kIgnoreThisTest);
 }
 
 }  // namespace