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 674e2c52e807ebaa00d0e8b5092baec9b8a6f4c0..8c4d0cb170209b25cd162c866b306a8993d8faf8 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1036,6 +1036,10 @@ 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";