Privatize StrongBinding lifetime management

device/serial/serial_connection_unittest.cc

Index: device/serial/serial_connection_unittest.cc
diff --git a/device/serial/serial_connection_unittest.cc b/device/serial/serial_connection_unittest.cc
index 00904b945aa4644d48aa6a4f8ae31db53120438c..39c15dba7dc0b63a41e71955c635dc7a868f15df 100644
--- a/device/serial/serial_connection_unittest.cc
+++ b/device/serial/serial_connection_unittest.cc
@@ -23,6 +23,7 @@
 #include "device/serial/test_serial_io_handler.h"
 #include "mojo/public/cpp/bindings/interface_ptr.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace device {
@@ -70,12 +71,13 @@ class SerialConnectionTest : public testing::Test {
   void SetUp() override {
     message_loop_.reset(new base::MessageLoop);
     mojo::InterfacePtr<serial::SerialService> service;
-    new SerialServiceImpl(
-        new SerialConnectionFactory(
-            base::Bind(&SerialConnectionTest::CreateIoHandler,
-                       base::Unretained(this)),
-            base::ThreadTaskRunnerHandle::Get()),
-        std::unique_ptr<SerialDeviceEnumerator>(new FakeSerialDeviceEnumerator),
+    mojo::MakeStrongBinding(
+        base::MakeUnique<SerialServiceImpl>(
+            new SerialConnectionFactory(
+                base::Bind(&SerialConnectionTest::CreateIoHandler,
+                           base::Unretained(this)),
+                base::ThreadTaskRunnerHandle::Get()),
+            base::MakeUnique<FakeSerialDeviceEnumerator>()),
         mojo::GetProxy(&service));
     service.set_connection_error_handler(base::Bind(
         &SerialConnectionTest::OnConnectionError, base::Unretained(this)));