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

net/url_request/url_request_file_dir_job.cc

Index: net/url_request/url_request_file_dir_job.cc
diff --git a/net/url_request/url_request_file_dir_job.cc b/net/url_request/url_request_file_dir_job.cc
index 0b05cbb9dd5899b3a2187d19efab598ced7a4c73..c6df6127e0feb7f7ebd511d33db0b0f2a2f72a53 100644
--- a/net/url_request/url_request_file_dir_job.cc
+++ b/net/url_request/url_request_file_dir_job.cc
@@ -16,6 +16,7 @@
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
 #include "net/url_request/url_request.h"
+#include "net/url_request/url_request_context.h"
 
 #if defined(OS_POSIX)
 #include <sys/stat.h>
@@ -25,7 +26,7 @@ namespace net {
 
 URLRequestFileDirJob::URLRequestFileDirJob(URLRequest* request,
                                            const FilePath& dir_path)
-    : URLRequestJob(request),
+    : URLRequestJob(request, request->context()->network_delegate()),
       ALLOW_THIS_IN_INITIALIZER_LIST(lister_(dir_path, this)),
       dir_path_(dir_path),
       canceled_(false),