Slow start pipelining.

net/http/http_stream_factory_impl.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_IMPL_H_
 #define NET_HTTP_HTTP_STREAM_FACTORY_IMPL_H_
 
 #include <map>
 #include <set>
 
 #include "base/memory/ref_counted.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/net_log.h"
 #include "net/http/http_pipelined_host_pool.h"
 #include "net/http/http_stream_factory.h"
 #include "net/proxy/proxy_server.h"
 
 namespace net {
 
 class HttpNetworkSession;
 class HttpPipelinedHost;
 class SpdySession;
 
-class NET_EXPORT_PRIVATE HttpStreamFactoryImpl : public HttpStreamFactory {
+class NET_EXPORT_PRIVATE HttpStreamFactoryImpl :
+    public HttpStreamFactory,
+    public HttpPipelinedHostPool::Delegate {
  public:
   explicit HttpStreamFactoryImpl(HttpNetworkSession* session);
   virtual ~HttpStreamFactoryImpl();
 
   // HttpStreamFactory Interface
   virtual HttpStreamRequest* RequestStream(
       const HttpRequestInfo& info,
       const SSLConfig& server_ssl_config,
       const SSLConfig& proxy_ssl_config,
       HttpStreamRequest::Delegate* delegate,
       const BoundNetLog& net_log) OVERRIDE;
 
   virtual void PreconnectStreams(int num_streams,
                                  const HttpRequestInfo& info,
                                  const SSLConfig& server_ssl_config,
                                  const SSLConfig& proxy_ssl_config,
                                  const BoundNetLog& net_log) OVERRIDE;
   virtual void AddTLSIntolerantServer(const HostPortPair& server) OVERRIDE;
   virtual bool IsTLSIntolerantServer(const HostPortPair& server) const OVERRIDE;
 
-  // Called when a HttpPipelinedHost has new capacity. Attempts to allocate any
-  // pending pipeline-capable requests to pipelines.
+  // HttpPipelinedHostPool::Delegate Interface
   virtual void OnHttpPipelinedHostHasAdditionalCapacity(
-      const HostPortPair& origin);
+      const HostPortPair& origin) OVERRIDE;
 
  private:
   class Request;
   class Job;
 
   typedef std::set<Request*> RequestSet;
   typedef std::map<HostPortProxyPair, RequestSet> SpdySessionRequestMap;
   typedef std::map<HostPortPair, RequestSet> HttpPipeliningRequestMap;
 
   bool GetAlternateProtocolRequestFor(const GURL& original_url,
@@ skipping 52 matching lines @@
   // object. They're owned by HttpStreamFactoryImpl. Leftover jobs will be
   // deleted when the factory is destroyed.
   std::set<const Job*> preconnect_job_set_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpStreamFactoryImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_FACTORY_IMPL_H_