Allow p2p UDP packages to set DSCP

net/udp/datagram_socket.h

Index: net/udp/datagram_socket.h
diff --git a/net/udp/datagram_socket.h b/net/udp/datagram_socket.h
index f0e9fa10baa7fb181b9b2cc6810459c6c31359d6..fa1627029100780a4d1d5c86fb274a05d8321a08 100644
--- a/net/udp/datagram_socket.h
+++ b/net/udp/datagram_socket.h
@@ -12,6 +12,33 @@ namespace net {
 class BoundNetLog;
 class IPEndPoint;
 
+// TODO(hubbe): Move this to net_util.h and implement SetToS
+// for tcp sockets as well.
+enum DiffServCodePoint {
+  DSCP_CS0  = 0,   // The default
+  DSCP_CS1  = 8,   // Bulk/background traffic
+  DSCP_AF11 = 10,
+  DSCP_AF12 = 12,
+  DSCP_AF13 = 14,
+  DSCP_CS2  = 16,
+  DSCP_AF21 = 18,
+  DSCP_AF22 = 20,
+  DSCP_AF23 = 22,
+  DSCP_CS3  = 24,
+  DSCP_AF31 = 26,
+  DSCP_AF32 = 28,
+  DSCP_AF33 = 30,
+  DSCP_CS4  = 32,
+  DSCP_AF41 = 34,  // Video
+  DSCP_AF42 = 36,  // Video
+  DSCP_AF43 = 38,  // Video
+  DSCP_CS5  = 40,  // Video
+  DSCP_EF   = 46,  // Voice
+  DSCP_CS6  = 48,  // Voice
+  DSCP_CS7  = 56,  // Control messages
+};
+
+
 // A datagram socket is an interface to a protocol which exchanges
 // datagrams, like UDP.
 class NET_EXPORT_PRIVATE DatagramSocket {