Simplify interface for media/cast: CastTransportSenderImpl

media/cast/net/udp_transport.h

Index: media/cast/net/udp_transport.h
diff --git a/media/cast/net/udp_transport.h b/media/cast/net/udp_transport.h
index 6da6ae3ac18a2b23da4e4981520d2f33acc8d980..c1c874f58205e037d3455ae91764754bf444f491 100644
--- a/media/cast/net/udp_transport.h
+++ b/media/cast/net/udp_transport.h
@@ -11,6 +11,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "base/values.h"
 #include "build/build_config.h"
 #include "media/cast/cast_environment.h"
 #include "media/cast/net/cast_transport_config.h"
@@ -49,8 +50,9 @@ class UdpTransport : public PacketSender {
   ~UdpTransport() final;
 
   // Start receiving packets. Packets are submitted to |packet_receiver|.
-  void StartReceiving(const PacketReceiverCallbackWithStatus& packet_receiver);
-  void StopReceiving();
+  void StartReceiving(
+      const PacketReceiverCallbackWithStatus& packet_receiver) final;
+  void StopReceiving() final;
 
   // Set a new DSCP value to the socket. The value will be set right before
   // the next send.