Collect all ConnectionAttempts from both sockets in TransportConnectJob.

net/socket/client_socket_pool_base_unittest.cc

Index: net/socket/client_socket_pool_base_unittest.cc
diff --git a/net/socket/client_socket_pool_base_unittest.cc b/net/socket/client_socket_pool_base_unittest.cc
index 087db231d7fea52127690994a945d2fe5847dae4..cfa9c6e115f70f14d3b4dbd7eb00d13a8f3086f8 100644
--- a/net/socket/client_socket_pool_base_unittest.cc
+++ b/net/socket/client_socket_pool_base_unittest.cc
@@ -177,6 +177,11 @@ class MockClientSocket : public StreamSocket {
   bool WasNpnNegotiated() const override { return false; }
   NextProto GetNegotiatedProtocol() const override { return kProtoUnknown; }
   bool GetSSLInfo(SSLInfo* ssl_info) override { return false; }
+  void GetConnectionAttempts(ConnectionAttempts* out) const override {
+    out->clear();
+  }
+  void ClearConnectionAttempts() override {}
+  void AddConnectionAttempts(const ConnectionAttempts& attempts) override {}
 
  private:
   bool connected_;