Change the stream_id for streams which are serialized out of order.

net/spdy/spdy_stream.cc

Index: net/spdy/spdy_stream.cc
diff --git a/net/spdy/spdy_stream.cc b/net/spdy/spdy_stream.cc
index c3b06868bafbe302f189fc0596c1d5f5fe150b9c..2698603fe78e1007cc7d9d19ecfd70d89d46c27a 100644
--- a/net/spdy/spdy_stream.cc
+++ b/net/spdy/spdy_stream.cc
@@ -519,6 +519,9 @@ int SpdyStream::SendRequest(bool has_upload_data) {
 
 int SpdyStream::WriteStreamData(IOBuffer* data, int length,
                                 SpdyDataFlags flags) {
+  // Until the headers have been completely sent, we can not be sure
+  // that our stream_id is correct.
+  DCHECK_GT(io_state_, STATE_SEND_HEADERS_COMPLETE);
   return session_->WriteStreamData(stream_id_, data, length, flags);
 }