Default to BBR congestion control for QUIC. Protected by

net/quic/core/quic_session.h

Index: net/quic/core/quic_session.h
diff --git a/net/quic/core/quic_session.h b/net/quic/core/quic_session.h
index 2a0803d434ee3b4b706a28e5a416ad67e3cfcb97..d70e4bdf6349ec74201df719d4d2fb37c55e05b2 100644
--- a/net/quic/core/quic_session.h
+++ b/net/quic/core/quic_session.h
@@ -215,8 +215,10 @@ class QUIC_EXPORT_PRIVATE QuicSession : public QuicConnectionVisitorInterface,
   // WINDOW_UPDATE arrives.
   void MarkConnectionLevelWriteBlocked(QuicStreamId id);
 
-  // Called by a stream when it becomes deletable.
-  void MarkStreamDeletable(QuicStreamId id);
+  // Called when stream |id| is done waiting for acks either because all data
+  // gets acked or is not interested in data being acked (which happens when
+  // a stream is reset because of an error).
+  void OnStreamDoneWaitingForAcks(QuicStreamId id);

[Ryan Hamilton, 2017/06/01 15:23:40]

This doesn't seem related to BBR. Did the BBR change get commingled with the
"waiting for acks" change?

 
   // Returns true if the session has data to be sent, either queued in the
   // connection, or in a write-blocked stream.