Collect all ConnectionAttempts from both sockets in TransportConnectJob.

net/socket/socket_test_util.h

Index: net/socket/socket_test_util.h
diff --git a/net/socket/socket_test_util.h b/net/socket/socket_test_util.h
index 3bd88d2772f751a822613c856d5e2c2f98da90e1..99a655fba013ec6213f189df94784d6dc2bc0aff 100644
--- a/net/socket/socket_test_util.h
+++ b/net/socket/socket_test_util.h
@@ -779,6 +779,9 @@ class MockClientSocket : public SSLClientSocket {
   const BoundNetLog& NetLog() const override;
   void SetSubresourceSpeculation() override {}
   void SetOmniboxSpeculation() override {}
+  void GetConnectionAttempts(ConnectionAttempts* out) const override;
+  void ClearConnectionAttempts() override {}
+  void AddConnectionAttempts(const ConnectionAttempts& attempts) override {}
 
   // SSLClientSocket implementation.
   void GetSSLCertRequestInfo(SSLCertRequestInfo* cert_request_info) override;