Fix chromium style checker error on windows sandbox code.

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() : job_handle_(NULL) {
+};
+
 Job::~Job() {
 };
 
 DWORD Job::Init(JobLevel security_level,
                 const wchar_t* job_name,
                 DWORD ui_exceptions,
                 size_t memory_limit) {
   if (job_handle_.IsValid())
     return ERROR_ALREADY_INITIALIZED;
 
@@ skipping 83 matching lines @@
   if (!job_handle_.IsValid())
     return ERROR_NO_DATA;
 
   if (FALSE == ::AssignProcessToJobObject(job_handle_.Get(), process_handle))
     return ::GetLastError();
 
   return ERROR_SUCCESS;
 }
 
 }  // namespace sandbox