Add stream number in GetSpdyDataStream() messages for better debugging.

gfe-relnote: no behavior change. not protected.
PiperOrigin-RevId: 284019857
Change-Id: I1901508fb9f82c1eb27bdd2dc145c2e73db65ed0

quic/core/http/quic_spdy_session.cc

diff --git a/quic/core/http/quic_spdy_session.cc b/quic/core/http/quic_spdy_session.cc
index 3a3441b..6680b88 100644
--- a/quic/core/http/quic_spdy_session.cc
+++ b/quic/core/http/quic_spdy_session.cc
@@ -622,9 +622,9 @@
     const QuicStreamId stream_id) {
   QuicStream* stream = GetOrCreateStream(stream_id);
   if (stream && stream->is_static()) {
-    QUIC_BUG << "GetSpdyDataStream returns static stream";
+    QUIC_BUG << "GetSpdyDataStream returns static stream " << stream_id;
     connection()->CloseConnection(
-        QUIC_INVALID_STREAM_ID, "stream is static",
+        QUIC_INVALID_STREAM_ID, QuicStrCat("stream ", stream_id, " is static"),
         ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
     return nullptr;
   }