Implement IPP model support in udp_proxy

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 967288f78aacdcdbb7b4870f0641dec2e60bac3c..bf953417f2b6be588fe2e6493265373716905e1d 100644
--- a/media/cast/test/utility/udp_proxy.h
+++ b/media/cast/test/utility/udp_proxy.h
@@ -180,6 +180,11 @@ scoped_ptr<PacketPipe> BadNetwork();
 // 300ms drouputs every ~2 seconds.
 scoped_ptr<PacketPipe> EvilNetwork();
 
+// Builds an Interrupted Poisson Process network simulator with default
+// settings. It simulates a challenging interference-heavy WiFi environment
+// of roughly 2mbits/s.
+scoped_ptr<InterruptedPoissonProcess> DefaultInterruptedPoissonProcess();
+
 }  // namespace test
 }  // namespace cast
 }  // namespace media