share all the needed linux code with OpenBSD in chrome and content

chrome/common/multi_process_lock.h

 // Copyright (c) 2010 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 CHROME_COMMON_MULTI_PROCESS_LOCK_H_
 #define CHROME_COMMON_MULTI_PROCESS_LOCK_H_
 #pragma once
 
 #include <sys/types.h>
 #include <string>
 
 // Platform abstraction for a lock that can be shared between processes.
 // The process that owns the lock will release it on exit even if
 // the exit is due to a crash. Locks are not recursive.
 class MultiProcessLock {
  public:
 
-  // The length of a multi-process lock name is limited on Linux, so
-  // it is limited it on all platforms for consistency. This length does
-  // not include a terminator.
-  static const size_t MULTI_PROCESS_LOCK_NAME_MAX_LEN = 106;
-
   // Factory method for creating a multi-process lock.
   // |name| is the name of the lock. The name has special meaning on Windows
   // where the prefix can determine the namespace of the lock.
   // See http://msdn.microsoft.com/en-us/library/aa382954(v=VS.85).aspx for
   // details.
   static MultiProcessLock* Create(const std::string& name);
 
   virtual ~MultiProcessLock() { }
 
   // Try to grab ownership of the lock.
   virtual bool TryLock() = 0;
 
   // Release ownership of the lock.
   virtual void Unlock() = 0;
 };
 
 #endif  // CHROME_COMMON_MULTI_PROCESS_LOCK_H_