Basic HTTP pipelining support

net/http/http_stream_factory.h

 // Copyright (c) 2011 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>
 
 #include "base/memory/ref_counted.h"
 #include "base/string16.h"
 #include "net/base/completion_callback.h"
 #include "net/base/load_states.h"
 #include "net/base/net_api.h"
 
 class GURL;
 
 namespace net {
 
 class BoundNetLog;
 class HostMappingRules;
 class HostPortPair;
 class HttpAlternateProtocols;
 class HttpAuthController;
 class HttpNetworkSession;
+class HttpPipelinedHost;
 class HttpResponseInfo;
 class HttpStream;
 class ProxyInfo;
 class SSLCertRequestInfo;
 class SSLInfo;
 class X509Certificate;
 struct HttpRequestInfo;
 struct SSLConfig;
 
 // The HttpStreamRequest is the client's handle to the worker object which
@@ skipping 128 matching lines @@
 
   // Requests that enough connections for |num_streams| be opened.
   virtual void PreconnectStreams(int num_streams,
                                  const HttpRequestInfo& info,
                                  const SSLConfig& ssl_config,
                                  const BoundNetLog& net_log) = 0;
 
   virtual void AddTLSIntolerantServer(const HostPortPair& server) = 0;
   virtual bool IsTLSIntolerantServer(const HostPortPair& server) const = 0;
 
+  // Called when a HttpPipelinedHost has new capacity. Attempts to allocate any
+  // pending pipeline-capable requests to the host.
+  virtual void OnHttpPipelinedHostHasAdditionalCapacity(
+      HttpPipelinedHost* host) = 0;
+
   // Static settings
   static GURL ApplyHostMappingRules(const GURL& url, HostPortPair* endpoint);
 
   // Turns spdy on or off.
   static void set_spdy_enabled(bool value) {
     spdy_enabled_ = value;
     if (value == false)
       set_next_protos("");
   }
   static bool spdy_enabled() { return spdy_enabled_; }
@@ skipping 55 matching lines @@
   static bool force_spdy_always_;
   static std::list<HostPortPair>* forced_spdy_exclusions_;
   static bool ignore_certificate_errors_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpStreamFactory);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_FACTORY_H_