Account for HTTP/2 padding in receive windows.

net/tools/flip_server/spdy_interface.cc

Index: net/tools/flip_server/spdy_interface.cc
diff --git a/net/tools/flip_server/spdy_interface.cc b/net/tools/flip_server/spdy_interface.cc
index 22da7db6eb86122301d76848d9de0aff62d0b13a..facbe5bf6db3ba01aa7e7d135a9ccf8f1315ef1f 100644
--- a/net/tools/flip_server/spdy_interface.cc
+++ b/net/tools/flip_server/spdy_interface.cc
@@ -240,6 +240,11 @@ void SpdySM::OnStreamFrameData(SpdyStreamId stream_id,
     interface->ProcessWriteInput(data, len);
 }
 
+void SpdySM::OnStreamPadding(SpdyStreamId stream_id, size_t len) {
+  VLOG(2) << ACCEPTOR_CLIENT_IDENT << "SpdySM: StreamPadding(" << stream_id
+          << ", [" << len << "])";
+}
+
 void SpdySM::OnSynStream(SpdyStreamId stream_id,
                          SpdyStreamId associated_stream_id,
                          SpdyPriority priority,