QUIC - disable QUIC under recent pathological connection errors.

net/quic/quic_client_session.h

Index: net/quic/quic_client_session.h
diff --git a/net/quic/quic_client_session.h b/net/quic/quic_client_session.h
index 414b9069b105cbdfdbbf5f2927d9857475d2f1f1..998be417f2ac5550d8edb6b504bf95bed38f39bc 100644
--- a/net/quic/quic_client_session.h
+++ b/net/quic/quic_client_session.h
@@ -194,6 +194,8 @@ class NET_EXPORT_PRIVATE QuicClientSession : public QuicClientSessionBase,
 
   const QuicServerId& server_id() const { return server_id_; }
 
+  const QuicDisabledReason disabled_reason() const { return disabled_reason_; }
+
  protected:
   // QuicSession methods:
   QuicDataStream* CreateIncomingDynamicStream(QuicStreamId id) override;
@@ -261,6 +263,7 @@ class NET_EXPORT_PRIVATE QuicClientSession : public QuicClientSessionBase,
   // True when the session is going away, and streams may no longer be created
   // on this session. Existing stream will continue to be processed.
   bool going_away_;
+  QuicDisabledReason disabled_reason_;
   base::WeakPtrFactory<QuicClientSession> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicClientSession);