Fix clang -Wwritable-strings warnings in the Windows sandbox

sandbox/win/src/job.cc

 // 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.
 
 #include "sandbox/win/src/job.h"
 
 #include "base/win/windows_version.h"
 #include "sandbox/win/src/restricted_token.h"
 
 namespace sandbox {
 
 Job::~Job() {
   if (job_handle_)
     ::CloseHandle(job_handle_);
 };
 
-DWORD Job::Init(JobLevel security_level, wchar_t *job_name,
+DWORD Job::Init(JobLevel security_level,
+                const wchar_t* job_name,
                 DWORD ui_exceptions) {
   if (job_handle_)
     return ERROR_ALREADY_INITIALIZED;
 
   job_handle_ = ::CreateJobObject(NULL,   // No security attribute
                                   job_name);
   if (!job_handle_)
     return ::GetLastError();
 
   JOBOBJECT_EXTENDED_LIMIT_INFORMATION jeli = {0};
@@ skipping 79 matching lines @@
   if (!job_handle_)
     return ERROR_NO_DATA;
 
   if (FALSE == ::AssignProcessToJobObject(job_handle_, process_handle))
     return ::GetLastError();
 
   return ERROR_SUCCESS;
 }
 
 }  // namespace sandbox