Slow start pipelining.

net/http/http_stream_factory_impl.h

Index: net/http/http_stream_factory_impl.h
diff --git a/net/http/http_stream_factory_impl.h b/net/http/http_stream_factory_impl.h
index ce1a04eb4cc488d3fcbf458d828793a8a6c2d2ae..3dee5f553c778825595785b2c764f3e6cb7ca77b 100644
--- a/net/http/http_stream_factory_impl.h
+++ b/net/http/http_stream_factory_impl.h
@@ -21,7 +21,9 @@ 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();
@@ -42,10 +44,9 @@ class NET_EXPORT_PRIVATE HttpStreamFactoryImpl : public HttpStreamFactory {
   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;