Process HTTP/2 ALTSVC frames.

net/spdy/spdy_test_util_common.h

Index: net/spdy/spdy_test_util_common.h
diff --git a/net/spdy/spdy_test_util_common.h b/net/spdy/spdy_test_util_common.h
index a649d94264a6ca5ac6b7e6690c4884637ee82757..a206cf2f13188a77b8374f28b452f1138e6fb6f5 100644
--- a/net/spdy/spdy_test_util_common.h
+++ b/net/spdy/spdy_test_util_common.h
@@ -513,6 +513,9 @@ class SpdyTestUtil {
       const std::unique_ptr<SpdySerializedFrame>& frame,
       int stream_id);
 
+  // Serialize a SpdyFrameIR with |headerless_spdy_framer_|.
+  SpdySerializedFrame SerializeFrame(const SpdyFrameIR& frame_ir);
+
   // Called when necessary (when it will affect stream dependency specification
   // when setting dependencies based on priorioties) to notify the utility
   // class of stream destruction.