NaCl: Clean up file descriptor setup in nacl_helper on linux

chrome/app/nacl_fork_delegate_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 CHROME_APP_NACL_FORK_DELEGATE_LINUX_H_
 #define CHROME_APP_NACL_FORK_DELEGATE_LINUX_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "content/public/common/zygote_fork_delegate_linux.h"
 
 // The NaClForkDelegate is created during Chrome linux zygote
 // initialization, and provides "fork()" functionality with
 // NaCl specific process characteristics (specifically address
 // space layout) as an alternative to forking the zygote.
 // A new delegate is passed in as an argument to ZygoteMain().
 class NaClForkDelegate : public content::ZygoteForkDelegate {
  public:
   NaClForkDelegate();
   virtual ~NaClForkDelegate();
 
-  virtual void Init(int browserdesc, int sandboxdesc) OVERRIDE;
+  virtual void Init(int sandboxdesc) OVERRIDE;
   virtual void InitialUMA(std::string* uma_name,
                           int* uma_sample,
                           int* uma_boundary_value) OVERRIDE;
   virtual bool CanHelp(const std::string& process_type, std::string* uma_name,
                           int* uma_sample, int* uma_boundary_value) OVERRIDE;
   virtual pid_t Fork(const std::vector<int>& fds) OVERRIDE;
   virtual bool AckChild(int fd,
                         const std::string& channel_switch) OVERRIDE;
 
  private:
   // These values are reported via UMA and hence they become permanent
   // constants.  Old values cannot be reused, only new ones added.
   enum NaClHelperStatus {
     kNaClHelperUnused = 0,
     kNaClHelperMissing = 1,
     kNaClHelperBootstrapMissing = 2,
     kNaClHelperValgrind = 3,
     kNaClHelperLaunchFailed = 4,
     kNaClHelperAckFailed = 5,
     kNaClHelperSuccess = 6,
     kNaClHelperStatusBoundary  // Must be one greater than highest value used.
   };
 
   NaClHelperStatus status_;
   int fd_;
 };
 
 #endif  // CHROME_APP_NACL_FORK_DELEGATE_LINUX_H_