Add a force pipelining option to load flags.

net/http/http_stream_factory_impl_job.h

Index: net/http/http_stream_factory_impl_job.h
diff --git a/net/http/http_stream_factory_impl_job.h b/net/http/http_stream_factory_impl_job.h
index ab15c8e17760c6d50821f50aa101be82bf1c0ef9..8e167da5c740d951b097cfac921a375b9166c4f5 100644
--- a/net/http/http_stream_factory_impl_job.h
+++ b/net/http/http_stream_factory_impl_job.h
@@ -13,6 +13,7 @@
 #include "net/base/ssl_config_service.h"
 #include "net/http/http_auth.h"
 #include "net/http/http_auth_controller.h"
+#include "net/http/http_pipelined_host.h"
 #include "net/http/http_request_info.h"
 #include "net/http/http_stream_factory_impl.h"
 #include "net/proxy/proxy_service.h"
@@ -280,6 +281,9 @@ class HttpStreamFactoryImpl::Job {
   // Only used if |new_spdy_session_| is non-NULL.
   bool spdy_session_direct_;
 
+  // Key used to identify the HttpPipelinedHost for |request_|.
+  scoped_ptr<HttpPipelinedHost::Key> http_pipelining_key_;
+
   // True if an existing pipeline can handle this job's request.
   bool existing_available_pipeline_;