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

net/spdy/spdy_session_pool.h

 // 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.
 
 #ifndef NET_SPDY_SPDY_SESSION_POOL_H_
 #define NET_SPDY_SPDY_SESSION_POOL_H_
 
 #include <map>
 #include <list>
 #include <string>
@@ skipping 86 matching lines @@
   // TODO(willchan): Consider renaming to HasReusableSession, since perhaps we
   // should be creating a new session. WARNING: Because of IP connection pooling
   // using the HostCache, if HasSession() returns true at one point, it does not
   // imply the SpdySessionPool will still have a matching session in the near
   // future, since the HostCache's entry may have expired.
   bool HasSession(const HostPortProxyPair& host_port_proxy_pair) const;
 
   // Close all SpdySessions, including any new ones created in the process of
   // closing the current ones.
   void CloseAllSessions();
-  // Close only the currently existing SpdySessions. Let any new ones created
-  // continue to live.
-  void CloseCurrentSessions();
+  // Close only the currently existing SpdySessions with |error|.
+  // Let any new ones created continue to live.
+  void CloseCurrentSessions(net::Error error);
   // Close only the idle SpdySessions.
   void CloseIdleSessions();
 
   // Removes a SpdySession from the SpdySessionPool. This should only be called
   // by SpdySession, because otherwise session->state_ is not set to CLOSED.
   void Remove(const scoped_refptr<SpdySession>& session);
 
   // Creates a Value summary of the state of the spdy session pool. The caller
   // responsible for deleting the returned value.
   base::Value* SpdySessionPoolInfoToValue() const;
@@ skipping 101 matching lines @@
   // This SPDY proxy is allowed to push resources from origins that are
   // different from those of their associated streams.
   HostPortPair trusted_spdy_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(SpdySessionPool);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_SESSION_POOL_H_