Decouple URLRequestJob from URLRequestContext; access NetworkDelegate as a contructor parameter.

net/url_request/url_request_file_job.cc

 // 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.
 
 // For loading files, we make use of overlapped i/o to ensure that reading from
 // the filesystem (e.g., a network filesystem) does not block the calling
 // thread.  An alternative approach would be to use a background thread or pool
 // of threads, but it seems better to leverage the operating system's ability
 // to do background file reads for us.
 //
@@ skipping 67 matching lines @@
   }
 
   URLRequestFileJob* owner_;
 
   base::Lock lock_;
   MessageLoop* owner_loop_;
 };
 
 URLRequestFileJob::URLRequestFileJob(URLRequest* request,
                                      const FilePath& file_path)
-    : URLRequestJob(request),
+    : URLRequestJob(request, request->context()->network_delegate()),
       file_path_(file_path),
       stream_(NULL),
       is_directory_(false),
       remaining_bytes_(0) {
 }
 
 // static
 URLRequestJob* URLRequestFileJob::Factory(URLRequest* request,
                                           const std::string& scheme) {
   FilePath file_path;
@@ skipping 242 matching lines @@
     NotifyDone(URLRequestStatus(URLRequestStatus::FAILED, result));
   }
 
   remaining_bytes_ -= result;
   DCHECK_GE(remaining_bytes_, 0);
 
   NotifyReadComplete(result);
 }
 
 }  // namespace net