Replace some net::ERR_FAILED generic error codes with more specific codes....

net/http/http_network_layer.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/http/http_network_layer.h"
 
 #include "base/logging.h"
 #include "net/http/http_network_session.h"
 #include "net/http/http_network_transaction.h"
 #include "net/socket/client_socket_factory.h"
@@ skipping 41 matching lines @@
     : socket_factory_(ClientSocketFactory::GetDefaultFactory()),
       ssl_config_service_(NULL),
       session_(session),
       suspended_(false) {
   DCHECK(session_.get());
 }
 
 HttpNetworkLayer::~HttpNetworkLayer() {
 }
 
-HttpTransaction* HttpNetworkLayer::CreateTransaction() {
+int HttpNetworkLayer::CreateTransaction(scoped_ptr<HttpTransaction>* trans) {
   if (suspended_)
-    return NULL;
+    return ERR_NETWORK_IO_SUSPENDED;
 
-  return new HttpNetworkTransaction(GetSession(), socket_factory_);
+  trans->reset(new HttpNetworkTransaction(GetSession(), socket_factory_));
+  return OK;
 }
 
 HttpCache* HttpNetworkLayer::GetCache() {
   return NULL;
 }
 
 void HttpNetworkLayer::Suspend(bool suspend) {
   suspended_ = suspend;
 
   if (suspend && session_)
     session_->tcp_socket_pool()->CloseIdleSockets();
 }
 
 HttpNetworkSession* HttpNetworkLayer::GetSession() {
   if (!session_) {
     DCHECK(proxy_service_);
     session_ = new HttpNetworkSession(host_resolver_, proxy_service_,
                                       socket_factory_, ssl_config_service_);
     // These were just temps for lazy-initializing HttpNetworkSession.
     host_resolver_ = NULL;
     proxy_service_ = NULL;
   }
   return session_;
 }
 
 }  // namespace net