Break out of the loop in QuicSession::OnCanWrite if the QuicConnection

net/quic/quic_connection.h

Index: net/quic/quic_connection.h
diff --git a/net/quic/quic_connection.h b/net/quic/quic_connection.h
index 2231157bbcc4f94e0e98770cbaf08802d408ff9d..bdc8be1fbedbc0a87458e53ef82800f9e3760d4a 100644
--- a/net/quic/quic_connection.h
+++ b/net/quic/quic_connection.h
@@ -341,6 +341,11 @@ class NET_EXPORT_PRIVATE QuicConnection
   // does nothing if there are no pending frames.
   void Flush();
 
+  // Returns true if the underlying UDP socket is writable, there is
+  // no queued data and the connection is not congestion-control
+  // blocked.
+  bool CanWriteStreamData();
+
   // Returns true if the connection has queued packets or frames.
   bool HasQueuedData() const;