Process HTTP/2 ALTSVC frames.

net/tools/flip_server/spdy_interface.h

Index: net/tools/flip_server/spdy_interface.h
diff --git a/net/tools/flip_server/spdy_interface.h b/net/tools/flip_server/spdy_interface.h
index 2d35652bfbf994332556842dcd2c2888845004cf..33f3abf873ddbb05c152d5c4cd46f97924e41d45 100644
--- a/net/tools/flip_server/spdy_interface.h
+++ b/net/tools/flip_server/spdy_interface.h
@@ -15,6 +15,7 @@
 
 #include "base/compiler_specific.h"
 #include "net/spdy/buffered_spdy_framer.h"
+#include "net/spdy/spdy_alt_svc_wire_format.h"
 #include "net/spdy/spdy_protocol.h"
 #include "net/tools/balsa/balsa_headers.h"
 #include "net/tools/balsa/balsa_visitor_interface.h"
@@ -140,6 +141,12 @@ class SpdySM : public BufferedSpdyFramerVisitorInterface, public SMInterface {
                      SpdyStreamId promised_stream_id,
                      const SpdyHeaderBlock& headers) override {}
 
+  // Called when an ALTSVC frame has been parsed.
+  void OnAltSvc(SpdyStreamId stream_id,
+                base::StringPiece origin,
+                const SpdyAltSvcWireFormat::AlternativeServiceVector&
+                    altsvc_vector) override {}
+
   bool OnUnknownFrame(SpdyStreamId stream_id, int frame_type) override;
 
  public: