Give performance_browser_tests lots of love and attention.

media/cast/test/utility/udp_proxy.h

Index: media/cast/test/utility/udp_proxy.h
diff --git a/media/cast/test/utility/udp_proxy.h b/media/cast/test/utility/udp_proxy.h
index 624639064a611da43faf9a82c750574532848384..046a21461802ddcf26acf21777a6503ba2a93026 100644
--- a/media/cast/test/utility/udp_proxy.h
+++ b/media/cast/test/utility/udp_proxy.h
@@ -175,6 +175,11 @@ std::unique_ptr<PacketPipe> GoodNetwork();
 // good wifi network. ~20mbit, 1% packet loss, ~3ms latency.
 std::unique_ptr<PacketPipe> WifiNetwork();
 
+// This method builds a stack of PacketPipes to emulate a slow, but
+// reasonably good "older technology" wifi network. ~2mbit, 1% packet loss,
+// ~30ms latency.
+std::unique_ptr<PacketPipe> SlowNetwork();
+
 // This method builds a stack of PacketPipes to emulate a
 // bad wifi network. ~5mbit, 5% packet loss, ~7ms latency
 // 40ms dropouts every ~2 seconds. Can reorder packets.