Move ZygoteHost implementation to content/browser/zygote_host

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_
-
-#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;
-
-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;
-  pid_t ForkRequest(const std::vector<std::string>& command_line,
-                    const base::GlobalDescriptors::Mapping& mapping,
-                    const std::string& process_type);
-  void EnsureProcessTerminated(pid_t process);
-
-  // Get the termination status (and, optionally, the exit code) of
-  // the process. |exit_code| is set to the exit code of the child
-  // process. (|exit_code| may be NULL.)
-  base::TerminationStatus GetTerminationStatus(base::ProcessHandle handle,
-                                               int* exit_code);
-
-  // ZygoteHost implementation:
-  virtual pid_t GetPid() const OVERRIDE;
-  virtual pid_t GetSandboxHelperPid() const OVERRIDE;
-  virtual int GetSandboxStatus() const OVERRIDE;
-  virtual void AdjustRendererOOMScore(base::ProcessHandle process_handle,
-                                      int score) OVERRIDE;
-  virtual void AdjustLowMemoryMargin(int64 margin_mb) OVERRIDE;
-
- private:
-  friend struct DefaultSingletonTraits<ZygoteHostImpl>;
-  ZygoteHostImpl();
-  virtual ~ZygoteHostImpl();
-
-  ssize_t ReadReply(void* buf, size_t buflen);
-
-  int control_fd_;  // the socket to the zygote
-  // A lock protecting all communication with the zygote. This lock must be
-  // acquired before sending a command and released after the result has been
-  // received.
-  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_