Clean up GPU process seccomp-bpf sandbox policies.

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().
 void InitializeSandbox() {
   bool seccomp_legacy_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;
   }
 
   // First, try to enable seccomp-legacy.
   seccomp_legacy_started = linux_sandbox->StartSeccompLegacy(process_type);
 
   // Then, try to enable seccomp-bpf.
   // If seccomp-legacy is enabled, seccomp-bpf initialization will crash
   // instead of failing gracefully.
   // TODO(markus): fix this (crbug.com/139872).
   if (!seccomp_legacy_started) {
     linux_sandbox->StartSeccompBpf(process_type);
   }
 }
 
 }  // namespace content