Move the Linux zygote stuff into its own per-process directory.

content/browser/zygote_host_impl_linux.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_BROWSER_ZYGOTE_HOST_IMPL_LINUX_H_
 #define CONTENT_BROWSER_ZYGOTE_HOST_IMPL_LINUX_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/global_descriptors_posix.h"
 #include "base/process_util.h"
 #include "base/synchronization/lock.h"
 #include "content/public/browser/zygote_host_linux.h"
 
 template<typename Type>
 struct DefaultSingletonTraits;
 
-static const char kZygoteMagic[] = "ZYGOTE_OK";
-
 class CONTENT_EXPORT ZygoteHostImpl : public content::ZygoteHost {
  public:
   // Returns the singleton instance.
   static ZygoteHostImpl* GetInstance();
 
   void Init(const std::string& sandbox_cmd);
 
   // Tries to start a process of type indicated by process_type.
   // Returns its pid on success, otherwise
   // base::kNullProcessHandle;
@@ skipping 39 matching lines @@
   base::Lock control_lock_;
   pid_t pid_;
   bool init_;
   bool using_suid_sandbox_;
   std::string sandbox_binary_;
   bool have_read_sandbox_status_word_;
   int sandbox_status_;
 };
 
 #endif  // CONTENT_BROWSER_ZYGOTE_HOST_IMPL_LINUX_H_