Use sockets with unread data if they've never been used before.

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 093604b2d7802c20cfd5970dd609a309743e620a..d23ca1d88b8a57ff0d1b2a427605b27a615ca957 100644
--- a/net/spdy/spdy_session.cc
+++ b/net/spdy/spdy_session.cc
@@ -1680,7 +1680,8 @@ base::Value* SpdySession::GetInfoAsValue() const {
 }
 
 bool SpdySession::IsReused() const {
-  return buffered_spdy_framer_->frames_received() > 0;
+  return buffered_spdy_framer_->frames_received() > 0 ||

[mmenke, 2014/03/18 15:16:55]

Hrm...  If we always received a settings frame first thing, would this always be
true?

[davidben, 2014/03/18 22:53:55]

SETTINGS frames aren't counted in this. It's oddly named and a somewhat odd
check, but I think it works? It counts:

SYN_STREAM
HEADERS
SYN_REPLY
data frames

+      connection_->reuse_type() == ClientSocketHandle::UNUSED_IDLE;

[mmenke, 2014/03/18 15:16:55]

can we just use connection->is_reused()?  Yes, it will never be REUSED_IDLE,
anyways, but still seems weird to just be checking for UNUSED_IDLE.

[davidben, 2014/03/18 22:53:55]

is_reused() is actually only REUSED_IDLE, not UNUSED_IDLE, which is sort of
bizarre. I haven't looked at all the callers to see if checking both would be
more correct or anything.

 }
 
 bool SpdySession::GetLoadTimingInfo(SpdyStreamId stream_id,