SPDY4 shouldn't emit RST_STREAM payloads.

net/spdy/buffered_spdy_framer.cc

Index: net/spdy/buffered_spdy_framer.cc
diff --git a/net/spdy/buffered_spdy_framer.cc b/net/spdy/buffered_spdy_framer.cc
index 5b95be2af2921c21c1a7d9b1d27a7525275791df..8424a15e64d0ba6b15fc03187186ed138f0b1b60 100644
--- a/net/spdy/buffered_spdy_framer.cc
+++ b/net/spdy/buffered_spdy_framer.cc
@@ -298,7 +298,9 @@ SpdyFrame* BufferedSpdyFramer::CreateSynReply(
 SpdyFrame* BufferedSpdyFramer::CreateRstStream(
     SpdyStreamId stream_id,
     SpdyRstStreamStatus status) const {
-  SpdyRstStreamIR rst_ir(stream_id, status, "RST");
+  // RST_STREAM payloads are not part of any SPDY spec.
+  // SpdyFramer will accept them, but don't create them.
+  SpdyRstStreamIR rst_ir(stream_id, status, "");
   return spdy_framer_.SerializeRstStream(rst_ir);
 }