Allows deferral of a URLRequest just before talking to the network, at

net/url_request/url_request_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.
 
 #include "net/url_request/url_request_job.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop/message_loop.h"
 #include "base/power_monitor/power_monitor.h"
@@ skipping 194 matching lines @@
 
   GURL redirect_url = deferred_redirect_url_;
   int redirect_status_code = deferred_redirect_status_code_;
 
   deferred_redirect_url_ = GURL();
   deferred_redirect_status_code_ = -1;
 
   FollowRedirect(redirect_url, redirect_status_code);
 }
 
+void URLRequestJob::ResumeNetworkStart() {
+  // This should only be called for HTTP Jobs, and implemented in the derived
+  // class.
+  NOTREACHED();
+}
+
 bool URLRequestJob::GetMimeType(std::string* mime_type) const {
   return false;
 }
 
 int URLRequestJob::GetResponseCode() const {
   return -1;
 }
 
 HostPortPair URLRequestJob::GetSocketAddress() const {
   return HostPortPair();
@@ skipping 43 matching lines @@
   return request_->CanSetCookie(cookie_line, options);
 }
 
 bool URLRequestJob::CanEnablePrivacyMode() const {
   if (!request_)
     return false;  // The request was destroyed, so there is no more work to do.
 
   return request_->CanEnablePrivacyMode();
 }
 
+void URLRequestJob::NotifyBeforeNetworkStart(bool* defer) {
+  if (!request_)
+    return;
+
+  request_->NotifyBeforeNetworkStart(defer);
+}
+
 void URLRequestJob::NotifyHeadersComplete() {
   if (!request_ || !request_->has_delegate())
     return;  // The request was destroyed, so there is no more work to do.
 
   if (has_handled_response_)
     return;
 
   DCHECK(!request_->status().is_io_pending());
 
   // Initialize to the current time, and let the subclass optionally override
@@ skipping 439 matching lines @@
 }
 
 bool URLRequestJob::FilterHasData() {
     return filter_.get() && filter_->stream_data_len();
 }
 
 void URLRequestJob::UpdatePacketReadTimes() {
 }
 
 }  // namespace net