Move the ProcessWatcher methods out of content/common/process_watcher into base/process_util, alo...

content/common/process_watcher.h

-// Copyright (c) 2011 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_PROCESS_WATCHER_H_
-#define CONTENT_COMMON_PROCESS_WATCHER_H_
-#pragma once
-
-#include "build/build_config.h"
-
-#include "base/basictypes.h"
-#include "base/process.h"
-#include "content/common/content_export.h"
-
-class CONTENT_EXPORT ProcessWatcher {
- public:
-  // This method ensures that the specified process eventually terminates, and
-  // then it closes the given process handle.
-  //
-  // It assumes that the process has already been signalled to exit, and it
-  // begins by waiting a small amount of time for it to exit.  If the process
-  // does not appear to have exited, then this function starts to become
-  // aggressive about ensuring that the process terminates.
-  //
-  // On Linux this method does not block the calling thread.
-  // On OS X this method may block for up to 2 seconds.
-  //
-  // NOTE: The process handle must have been opened with the PROCESS_TERMINATE
-  // and SYNCHRONIZE permissions.
-  //
-  static void EnsureProcessTerminated(base::ProcessHandle process_handle);
-
-#if defined(OS_POSIX) && !defined(OS_MACOSX)
-  // The nicer version of EnsureProcessTerminated() that is patient and will
-  // wait for |process_handle| to finish and then reap it.
-  static void EnsureProcessGetsReaped(base::ProcessHandle process_handle);
-#endif
-
- private:
-  // Do not instantiate this class.
-  ProcessWatcher();
-
-  DISALLOW_COPY_AND_ASSIGN(ProcessWatcher);
-};
-
-#endif  // CONTENT_COMMON_PROCESS_WATCHER_H_