Introduce ERR_NETWORK_CHANGED and allow URLFetcher to automatically retry on that error.

net/http/http_network_session.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/http/http_network_session.h"
 
 #include <utility>
 
 #include "base/compiler_specific.h"
 #include "base/debug/stack_trace.h"
@@ skipping 156 matching lines @@
   return normal_socket_pool_manager_->SocketPoolInfoToValue();
 }
 
 Value* HttpNetworkSession::SpdySessionPoolInfoToValue() const {
   return spdy_session_pool_.SpdySessionPoolInfoToValue();
 }
 
 void HttpNetworkSession::CloseAllConnections() {
   normal_socket_pool_manager_->FlushSocketPools();
   websocket_socket_pool_manager_->FlushSocketPools();
-  spdy_session_pool_.CloseCurrentSessions();
+  spdy_session_pool_.CloseCurrentSessions(ERR_ABORTED);
 }
 
 void HttpNetworkSession::CloseIdleConnections() {
   normal_socket_pool_manager_->CloseIdleSockets();
   websocket_socket_pool_manager_->CloseIdleSockets();
   spdy_session_pool_.CloseIdleSessions();
 }
 
 ClientSocketPoolManager* HttpNetworkSession::GetSocketPoolManager(
     SocketPoolType pool_type) {
   switch (pool_type) {
     case NORMAL_SOCKET_POOL:
       return normal_socket_pool_manager_.get();
     case WEBSOCKET_SOCKET_POOL:
       return websocket_socket_pool_manager_.get();
     default:
       NOTREACHED();
       break;
   }
   return NULL;
 }
 
 }  //  namespace net