Use the right priority when marking QUIC streams write blocked via

net/quic/quic_session.cc

Index: net/quic/quic_session.cc
diff --git a/net/quic/quic_session.cc b/net/quic/quic_session.cc
index 5ac6a9d0e5236b24050a8a4b992d6ef94659711b..a981b5e8e9e6b42ee24cde40a5a5260a305f58b3 100644
--- a/net/quic/quic_session.cc
+++ b/net/quic/quic_session.cc
@@ -588,6 +588,17 @@ size_t QuicSession::GetNumOpenStreams() const {
 }
 
 void QuicSession::MarkWriteBlocked(QuicStreamId id, QuicPriority priority) {
+#ifndef NDEBUG
+  ReliableQuicStream* stream = GetStream(id);
+  if (stream != NULL) {
+    LOG_IF(DFATAL, priority != stream->EffectivePriority())
+        << "Priorities do not match.  Got: " << priority
+        << " Expected: " << stream->EffectivePriority();
+  } else {
+    LOG(DFATAL) << "Marking unknown stream " << id << " blocked.";
+  }
+#endif
+
   if (id == kCryptoStreamId) {
     DCHECK(!has_pending_handshake_);
     has_pending_handshake_ = true;