Retry upon 421 status code without IP pooling.

net/http/http_stream_factory.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_HTTP_HTTP_STREAM_FACTORY_H_
 #define NET_HTTP_HTTP_STREAM_FACTORY_H_
 
 #include <list>
 #include <string>
 
@@ skipping 190 matching lines @@
   // Virtual interface methods.
 
   // Request a stream.
   // Will call delegate->OnStreamReady on successful completion.
   virtual HttpStreamRequest* RequestStream(
       const HttpRequestInfo& info,
       RequestPriority priority,
       const SSLConfig& server_ssl_config,
       const SSLConfig& proxy_ssl_config,
       HttpStreamRequest::Delegate* delegate,
+      bool enable_ip_based_pooling,
       const NetLogWithSource& net_log) = 0;
 
   // Request a WebSocket handshake stream.
   // Will call delegate->OnWebSocketHandshakeStreamReady on successful
   // completion.
   virtual HttpStreamRequest* RequestWebSocketHandshakeStream(
       const HttpRequestInfo& info,
       RequestPriority priority,
       const SSLConfig& server_ssl_config,
       const SSLConfig& proxy_ssl_config,
       HttpStreamRequest::Delegate* delegate,
       WebSocketHandshakeStreamBase::CreateHelper* create_helper,
+      bool enable_ip_based_pooling,
       const NetLogWithSource& net_log) = 0;
 
   // Request a BidirectionalStreamImpl.
   // Will call delegate->OnBidirectionalStreamImplReady on successful
   // completion.
   virtual HttpStreamRequest* RequestBidirectionalStreamImpl(
       const HttpRequestInfo& info,
       RequestPriority priority,
       const SSLConfig& server_ssl_config,
       const SSLConfig& proxy_ssl_config,
       HttpStreamRequest::Delegate* delegate,
+      bool enable_ip_based_pooling,
       const NetLogWithSource& net_log) = 0;
 
   // Requests that enough connections for |num_streams| be opened.
   virtual void PreconnectStreams(int num_streams,
                                  const HttpRequestInfo& info) = 0;
 
   virtual const HostMappingRules* GetHostMappingRules() const = 0;
 
   // Dumps memory allocation stats. |parent_dump_absolute_name| is the name
   // used by the parent MemoryAllocatorDump in the memory dump hierarchy.
   virtual void DumpMemoryStats(
       base::trace_event::ProcessMemoryDump* pmd,
       const std::string& parent_absolute_name) const = 0;
 
  protected:
   HttpStreamFactory();
 
  private:
   url::SchemeHostPort RewriteHost(const url::SchemeHostPort& server);
 
   DISALLOW_COPY_AND_ASSIGN(HttpStreamFactory);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_FACTORY_H_