Linux sandbox: componentize almost everything.

sandbox/linux/services/init_process_reaper.h

 // 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.
 
 #ifndef SANDBOX_LINUX_SERVICES_INIT_PROCESS_REAPER_H_
 #define SANDBOX_LINUX_SERVICES_INIT_PROCESS_REAPER_H_
 
 #include "base/callback_forward.h"
+#include "sandbox/linux/sandbox_export.h"
 
 namespace sandbox {
 
 // The current process will fork(). The parent will become a process reaper
 // like init(1). The child will continue normally (after this function
 // returns).
 // If not NULL, |post_fork_parent_callback| will run in the parent almost
 // immediately after fork().
 // Since this function calls fork(), it's very important that the caller has
 // only one thread running.
-bool CreateInitProcessReaper(base::Closure* post_fork_parent_callback);
+SANDBOX_EXPORT bool CreateInitProcessReaper(
+    base::Closure* post_fork_parent_callback);
 
 }  // namespace sandbox.
 
 #endif  // SANDBOX_LINUX_SERVICES_INIT_PROCESS_REAPER_H_