Set serial connection parameters immediately on connect.

device/serial/serial_service_unittest.cc

Index: device/serial/serial_service_unittest.cc
diff --git a/device/serial/serial_service_unittest.cc b/device/serial/serial_service_unittest.cc
index bf0821777e53504d3f5e76966a9fd83970ffa88b..7f8beb23b5f59a73ef056d76ad12e041b123600e 100644
--- a/device/serial/serial_service_unittest.cc
+++ b/device/serial/serial_service_unittest.cc
@@ -28,6 +28,7 @@ class FakeSerialDeviceEnumerator : public SerialDeviceEnumerator {
 class FailToOpenIoHandler : public TestSerialIoHandler {
  public:
   void Open(const std::string& port,
+            const serial::ConnectionOptions& options,
             const OpenCompleteCallback& callback) override {
     callback.Run(false);
   }