Deprecate instead of close SPDY sessions upon network change.

net/spdy/spdy_session.cc

Index: net/spdy/spdy_session.cc
diff --git a/net/spdy/spdy_session.cc b/net/spdy/spdy_session.cc
index 9508f0e6af47da6326ecb732c14bdd86e3a4d314..8c78dbb045abd02f24cff864af643a41c3cb0b80 100644
--- a/net/spdy/spdy_session.cc
+++ b/net/spdy/spdy_session.cc
@@ -2285,6 +2285,16 @@ void SpdySession::OnGoAway(SpdyStreamId last_accepted_stream_id,
                  active_streams_.size(),
                  unclaimed_pushed_streams_.size(),
                  status));
+  Deprecate();
+  StartGoingAway(last_accepted_stream_id, ERR_ABORTED);
+  // This is to handle the case when we already don't have any active
+  // streams (i.e., StartGoingAway() did nothing). Otherwise, we have
+  // active streams and so the last one being closed will finish the
+  // going away process (see DeleteStream()).
+  MaybeFinishGoingAway();
+}
+
+void SpdySession::Deprecate() {
   if (availability_state_ < STATE_GOING_AWAY) {
     availability_state_ = STATE_GOING_AWAY;
     // |pool_| will be NULL when |InitializeWithSocket()| is in the
@@ -2292,12 +2302,6 @@ void SpdySession::OnGoAway(SpdyStreamId last_accepted_stream_id,
     if (pool_)
       pool_->MakeSessionUnavailable(GetWeakPtr());
   }
-  StartGoingAway(last_accepted_stream_id, ERR_ABORTED);
-  // This is to handle the case when we already don't have any active
-  // streams (i.e., StartGoingAway() did nothing). Otherwise, we have
-  // active streams and so the last one being closed will finish the
-  // going away process (see DeleteStream()).
-  MaybeFinishGoingAway();
 }
 
 void SpdySession::OnPing(uint32 unique_id) {