Add support for setting QUIC connection options via field trial config.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index a296c2d8e4c036d0fccc46e546338dbf800828dc..a556b9ec7417254d893ba2f6331b2a832f7a4b0b 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1026,6 +1026,10 @@ const char kProxyPacUrl[]                   = "proxy-pac-url";
 // affects HTTP and HTTPS requests.
 const char kProxyServer[]                   = "proxy-server";
 
+// Specifies a comma separated list of QUIC connection options to send to
+// the server.
+const char kQuicConnectionOptions[]         = "quic-connection-options";
+
 // Specifies the maximum length for a QUIC packet.
 const char kQuicMaxPacketLength[]           = "quic-max-packet-length";