Remove implicit conversions from scoped_refptr to T* in device/

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 b14d95f1f3e618aa459e4106a88826da4226bb91..a02d075df7adae441ee1afbfd7b455197bd4e13f 100644
--- a/device/serial/serial_service_unittest.cc
+++ b/device/serial/serial_service_unittest.cc
@@ -70,7 +70,7 @@ class SerialServiceTest : public testing::Test, public mojo::ErrorHandler {
   scoped_refptr<SerialIoHandler> ReturnIoHandler() { return io_handler_; }
 
   void RunConnectTest(const std::string& path, bool expecting_success) {
-    if (!io_handler_)
+    if (!io_handler_.get())
       io_handler_ = new TestSerialIoHandler;
     mojo::InterfacePtr<serial::SerialService> service;
     mojo::BindToProxy(