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

net/url_request/url_request_job.cc

Index: net/url_request/url_request_job.cc
diff --git a/net/url_request/url_request_job.cc b/net/url_request/url_request_job.cc
index 255e90d42be55efd95f285f5acc8d3e5c94af572..91dc5ba9a905bce5e03dd1d8aa7b50862736ad21 100644
--- a/net/url_request/url_request_job.cc
+++ b/net/url_request/url_request_job.cc
@@ -17,11 +17,11 @@
 #include "net/base/network_delegate.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request.h"
-#include "net/url_request/url_request_context.h"
 
 namespace net {
 
-URLRequestJob::URLRequestJob(URLRequest* request)
+URLRequestJob::URLRequestJob(URLRequest* request,
+                             NetworkDelegate* network_delegate)
     : request_(request),
       done_(false),
       prefilter_bytes_read_(0),
@@ -32,6 +32,7 @@ URLRequestJob::URLRequestJob(URLRequest* request)
       has_handled_response_(false),
       expected_content_size_(-1),
       deferred_redirect_status_code_(-1),
+      network_delegate_(network_delegate),
       ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)) {
   base::SystemMonitor* system_monitor = base::SystemMonitor::Get();
   if (system_monitor)
@@ -692,9 +693,8 @@ void URLRequestJob::RecordBytesRead(int bytes_read) {
            << " pre total = " << prefilter_bytes_read_
            << " post total = " << postfilter_bytes_read_;
   UpdatePacketReadTimes();  // Facilitate stats recording if it is active.
-  const URLRequestContext* context = request_->context();
-  if (context && context->network_delegate())
-    context->network_delegate()->NotifyRawBytesRead(*request_, bytes_read);
+  if (network_delegate_)
+    network_delegate_->NotifyRawBytesRead(*request_, bytes_read);
 }
 
 bool URLRequestJob::FilterHasData() {