Remove #pragma once from content

content/common/seccomp_sandbox.h

 // 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.
 
 #ifndef CONTENT_COMMON_SECCOMP_SANDBOX_H_
 #define CONTENT_COMMON_SECCOMP_SANDBOX_H_
-#pragma once
 
 // Seccomp enable/disable logic is centralized here.
 // - We define SECCOMP_SANDBOX if seccomp is compiled in at all: currently,
 //   on non-views (non-ChromeOS) non-ARM non-Clang Linux only.
 // - If we have SECCOMP_SANDBOX, we provide SeccompSandboxEnabled() as
 //   a run-time test to determine whether to turn on seccomp:
 //   currently, on by default in debug builds and off by default in
 //   release.
 
 #include "base/command_line.h"
@@ skipping 18 matching lines @@
       switches::kEnableSeccompSandbox);
 #else
   // On by default; allow turning off with a switch.
   return !CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kDisableSeccompSandbox);
 #endif  // NDEBUG
 }
 #endif  // SECCOMP_SANDBOX
 
 #endif  // CONTENT_COMMON_SECCOMP_SANDBOX_H_