Removing file_thread_task_runner parameter from SerialIoHandler

tools/battor_agent/battor_connection_impl_unittest.cc

Index: tools/battor_agent/battor_connection_impl_unittest.cc
diff --git a/tools/battor_agent/battor_connection_impl_unittest.cc b/tools/battor_agent/battor_connection_impl_unittest.cc
index d77ff7d957d99ffbeb384f00f966b94605bf7a82..99561b5c379b432b84a27589f0a4506df60013a5 100644
--- a/tools/battor_agent/battor_connection_impl_unittest.cc
+++ b/tools/battor_agent/battor_connection_impl_unittest.cc
@@ -28,7 +28,7 @@ namespace battor {
 class TestableBattOrConnection : public BattOrConnectionImpl {
  public:
   TestableBattOrConnection(BattOrConnection::Listener* listener)
-      : BattOrConnectionImpl("/dev/test", listener, nullptr, nullptr) {}
+      : BattOrConnectionImpl("/dev/test", listener, nullptr) {}
   scoped_refptr<device::SerialIoHandler> CreateIoHandler() override {
     return device::TestSerialIoHandler::Create();
   }