Convert device to std::unique_ptr

device/serial/serial_io_handler_win.h

Index: device/serial/serial_io_handler_win.h
diff --git a/device/serial/serial_io_handler_win.h b/device/serial/serial_io_handler_win.h
index 88439bf9b302907f2df3ed832b272e2bed8ca7db..67cac0a973ac0d3797bb516cc7d3c7b0663e4287 100644
--- a/device/serial/serial_io_handler_win.h
+++ b/device/serial/serial_io_handler_win.h
@@ -5,8 +5,9 @@
 #ifndef DEVICE_SERIAL_SERIAL_IO_HANDLER_WIN_H_
 #define DEVICE_SERIAL_SERIAL_IO_HANDLER_WIN_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
@@ -49,13 +50,13 @@ class SerialIoHandlerWin : public SerialIoHandler,
   void OnDeviceRemoved(const std::string& device_path);
 
   // Context used for asynchronous WaitCommEvent calls.
-  scoped_ptr<base::MessageLoopForIO::IOContext> comm_context_;
+  std::unique_ptr<base::MessageLoopForIO::IOContext> comm_context_;
 
   // Context used for overlapped reads.
-  scoped_ptr<base::MessageLoopForIO::IOContext> read_context_;
+  std::unique_ptr<base::MessageLoopForIO::IOContext> read_context_;
 
   // Context used for overlapped writes.
-  scoped_ptr<base::MessageLoopForIO::IOContext> write_context_;
+  std::unique_ptr<base::MessageLoopForIO::IOContext> write_context_;
 
   // Asynchronous event mask state
   DWORD event_mask_;