Add a force pipelining option to load flags.

chrome/browser/net/http_pipelining_compatibility_client.cc

Index: chrome/browser/net/http_pipelining_compatibility_client.cc
diff --git a/chrome/browser/net/http_pipelining_compatibility_client.cc b/chrome/browser/net/http_pipelining_compatibility_client.cc
index 2a44b2cc0e5c3b17ee2069d582642f2b007e21e9..b9051999db179858cbc70f27cadaf501ae887436 100644
--- a/chrome/browser/net/http_pipelining_compatibility_client.cc
+++ b/chrome/browser/net/http_pipelining_compatibility_client.cc
@@ -74,13 +74,13 @@ HttpPipeliningCompatibilityClient::Request::Request(
       client_(client),
       finished_(false) {
   request_.set_context(url_request_context);
-  // TODO(simonjam): Force pipelining.
   request_.set_load_flags(net::LOAD_BYPASS_CACHE |
                           net::LOAD_DISABLE_CACHE |
                           net::LOAD_DO_NOT_SAVE_COOKIES |
                           net::LOAD_DO_NOT_SEND_COOKIES |
                           net::LOAD_DO_NOT_PROMPT_FOR_LOGIN |
-                          net::LOAD_DO_NOT_SEND_AUTH_DATA);
+                          net::LOAD_DO_NOT_SEND_AUTH_DATA |
+                          net::LOAD_FORCE_HTTP_PIPELINING);
   request_.Start();
 }