Linux: make current InitializeSandbox() private.

content/common/sandbox_init_linux.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 <string>
-
-#include "base/command_line.h"
-#include "base/logging.h"
-#include "content/common/sandbox_linux.h"
-#include "content/public/common/content_switches.h"
-#include "content/public/common/sandbox_init.h"
-
-namespace content {
-
-// TODO(jln): have call sites provide a process / policy type to
-// InitializeSandbox().
-bool InitializeSandbox() {
-  bool seccomp_legacy_started = false;
-  bool seccomp_bpf_started = false;
-  LinuxSandbox* linux_sandbox = LinuxSandbox::GetInstance();
-  const std::string process_type =
-      CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
-          switches::kProcessType);
-
-  // No matter what, it's always an error to call InitializeSandbox() after
-  // threads have been created.
-  if (!linux_sandbox->IsSingleThreaded()) {
-    std::string error_message = "InitializeSandbox() called with multiple "
-                                "threads in process " + process_type;
-    // TODO(jln): change this into a CHECK() once we are more comfortable it
-    // does not trigger.
-    LOG(ERROR) << error_message;
-    return false;
-  }
-
-  // Attempt to limit the future size of the address space of the process.
-  linux_sandbox->LimitAddressSpace(process_type);
-
-  // First, try to enable seccomp-bpf.
-  seccomp_bpf_started = linux_sandbox->StartSeccompBpf(process_type);
-
-  // If that fails, try to enable seccomp-legacy.
-  if (!seccomp_bpf_started) {
-    seccomp_legacy_started = linux_sandbox->StartSeccompLegacy(process_type);
-  }
-
-  return seccomp_legacy_started || seccomp_bpf_started;
-}
-
-}  // namespace content