QUIC - Add back to code to experiment with delay_tcp_race. By default,

chrome/browser/io_thread.h

Index: chrome/browser/io_thread.h
diff --git a/chrome/browser/io_thread.h b/chrome/browser/io_thread.h
index b9a190dafc1cc7c48893465d3a9475fa28828470..85210ba1abdb46ce0de8348ce584a049ddf91364 100644
--- a/chrome/browser/io_thread.h
+++ b/chrome/browser/io_thread.h
@@ -330,6 +330,10 @@ class IOThread : public content::BrowserThreadDelegate {
     static int GetQuicSocketReceiveBufferSize(
         const VariationParameters& quic_trial_params);
 
+    // Returns true if QUIC should delay TCP connection when QUIC works.
+    static bool ShouldQuicDelayTcpRace(
+        const VariationParameters& quic_trial_params);
+
     // Returns true if QUIC should close sessions when any of the client's IP
     // addresses change.
     static bool ShouldQuicCloseSessionsOnIpChange(