Consistently suggest ephemeral port for QUIC client

net/quic/quic_stream_factory.h

Index: net/quic/quic_stream_factory.h
diff --git a/net/quic/quic_stream_factory.h b/net/quic/quic_stream_factory.h
index 95a3d369d9069490a27d3666c2945c2e0c46a671..ab669b9f6b7664b73d205d6df5301d21fe3504b5 100644
--- a/net/quic/quic_stream_factory.h
+++ b/net/quic/quic_stream_factory.h
@@ -230,6 +230,10 @@ class NET_EXPORT_PRIVATE QuicStreamFactory
 
   base::WeakPtrFactory<QuicStreamFactory> weak_factory_;
 
+  // Entropy to help consistently select the same ephemeral port for repeated
+  // connections to the same server.

[wtc, 2013/12/06 23:36:44]

This comment is confusing because it describes a port suggester. It is more
important for this comment to describe the port_entropy_ member, which deals
with user profile isolation.

[jar (doing other things), 2013/12/07 00:47:58]

Extended comment.  See if this is clearer.

+  uint64 port_entropy_;
+
   DISALLOW_COPY_AND_ASSIGN(QuicStreamFactory);
 };