Add a force pipelining option to load flags.

net/http/http_pipelined_connection_impl.h

Index: net/http/http_pipelined_connection_impl.h
diff --git a/net/http/http_pipelined_connection_impl.h b/net/http/http_pipelined_connection_impl.h
index e09c3f9dbcc5f98fa44880f49a709308cb8951bc..62cfb966dec3aa303a7f52eec82e75b125202a04 100644
--- a/net/http/http_pipelined_connection_impl.h
+++ b/net/http/http_pipelined_connection_impl.h
@@ -46,6 +46,24 @@ class SSLInfo;
 class NET_EXPORT_PRIVATE HttpPipelinedConnectionImpl
     : public HttpPipelinedConnection {
  public:
+  class Factory : public HttpPipelinedConnection::Factory {
+   public:
+    virtual HttpPipelinedConnection* CreateNewPipeline(
+        ClientSocketHandle* connection,
+        HttpPipelinedConnection::Delegate* delegate,
+        const HostPortPair& origin,
+        const SSLConfig& used_ssl_config,
+        const ProxyInfo& used_proxy_info,
+        const BoundNetLog& net_log,
+        bool was_npn_negotiated,
+        SSLClientSocket::NextProto protocol_negotiated) OVERRIDE {
+      return new HttpPipelinedConnectionImpl(connection, delegate, origin,
+                                             used_ssl_config, used_proxy_info,
+                                             net_log, was_npn_negotiated,
+                                             protocol_negotiated);
+    }
+  };
+
   HttpPipelinedConnectionImpl(ClientSocketHandle* connection,
                               Delegate* delegate,
                               const HostPortPair& origin,