Reduce the amount of included header files. Vast change like in "Oh God! This...

net/url_request/url_request_error_job.cc

 // Copyright (c) 2006-2008 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 "net/url_request/url_request_error_job.h"
 
 #include "base/message_loop.h"
 #include "net/base/net_errors.h"
+#include "net/url_request/url_request_status.h"
 
 URLRequestErrorJob::URLRequestErrorJob(URLRequest* request, int error)
     : URLRequestJob(request), error_(error) {
 }
 
 void URLRequestErrorJob::Start() {
   MessageLoop::current()->PostTask(FROM_HERE, NewRunnableMethod(
       this, &URLRequestErrorJob::StartAsync));
 }
 
 void URLRequestErrorJob::StartAsync() {
   NotifyStartError(URLRequestStatus(URLRequestStatus::FAILED, error_));
 }