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

net/spdy/spdy_session_spdy2_unittest.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/spdy/spdy_session.h"
 
 #include "net/base/host_cache.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_log_unittest.h"
 #include "net/spdy/spdy_io_buffer.h"
@@ skipping 1072 matching lines @@
   session_deps.host_resolver->GetHostCache()->clear();
   EXPECT_TRUE(spdy_session_pool->HasSession(test_hosts[1].pair));
 
   // Cleanup the sessions.
   if (!clean_via_close_current_sessions) {
     spdy_session_pool->Remove(session);
     session = NULL;
     spdy_session_pool->Remove(session2);
     session2 = NULL;
   } else {
-    spdy_session_pool->CloseCurrentSessions();
+    spdy_session_pool->CloseCurrentSessions(net::ERR_ABORTED);
   }
 
   // Verify that the map is all cleaned up.
   EXPECT_FALSE(spdy_session_pool->HasSession(test_hosts[0].pair));
   EXPECT_FALSE(spdy_session_pool->HasSession(test_hosts[1].pair));
   EXPECT_FALSE(spdy_session_pool->HasSession(test_hosts[2].pair));
 }
 
 }  // namespace
 
@@ skipping 476 matching lines @@
   session->CloseSessionOnError(ERR_ABORTED, true, "");
 
   EXPECT_TRUE(spdy_stream1->closed());
   EXPECT_TRUE(spdy_stream2->closed());
 
   spdy_stream1 = NULL;
   spdy_stream2 = NULL;
 }
 
 }  // namespace net