if trace != nil && trace.TLSHandshakeDone != nil {
		trace.TLSHandshakeDone(cs, nil)
	}
	pconn.tlsState = &cs
	pconn.conn = tlsConn
	return nil
}

type erringRoundTripper interface {
	RoundTripErr() error
}

var testHookProxyConnectTimeout = context.WithTimeout

func (t *Transport) dialConn(ctx context.Context, cm connectMethod) (pconn *persistConn, err error) {
	pconn = &persistConn{

		res, err := cc.RoundTrip(req)
		if err != nil && retry <= 6 {
			roundTripErr := err
			if req, err = http2shouldRetryRequest(req, err); err == nil {
				// After the first retry, do exponential backoff with 10% jitter.
				if retry == 0 {
					t.vlogf("RoundTrip retrying after failure: %v", roundTripErr)
					continue
				}
				backoff := float64(uint(1) << (uint(retry) - 1))