Convert device to std::unique_ptr

device/usb/mojo/device_impl_unittest.cc

Index: device/usb/mojo/device_impl_unittest.cc
diff --git a/device/usb/mojo/device_impl_unittest.cc b/device/usb/mojo/device_impl_unittest.cc
index 7f99ce1e3ec698ffb8ff9d937302b0622284ad92..90adeaa3c2d85cd7db814217e389a33a1171ca5a 100644
--- a/device/usb/mojo/device_impl_unittest.cc
+++ b/device/usb/mojo/device_impl_unittest.cc
@@ -8,6 +8,7 @@
 #include <stdint.h>
 
 #include <map>
+#include <memory>
 #include <numeric>
 #include <queue>
 #include <set>
@@ -424,7 +425,7 @@ class USBDeviceImplTest : public testing::Test {
     callback.Run(buffer, packets);
   }
 
-  scoped_ptr<base::MessageLoop> message_loop_;
+  std::unique_ptr<base::MessageLoop> message_loop_;
   scoped_refptr<MockUsbDevice> mock_device_;
   scoped_refptr<MockUsbDeviceHandle> mock_handle_;
   bool is_device_open_;