Convert device to std::unique_ptr

device/serial/data_source_sender.cc

Index: device/serial/data_source_sender.cc
diff --git a/device/serial/data_source_sender.cc b/device/serial/data_source_sender.cc
index af2ddcb40cf6e37ad2e1b90c07027c562593aaf6..7dd32b1d5c91621e6fc86232c66db03be3c400c9 100644
--- a/device/serial/data_source_sender.cc
+++ b/device/serial/data_source_sender.cc
@@ -6,6 +6,7 @@
 
 #include <algorithm>
 #include <limits>
+#include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ -186,7 +187,7 @@ void DataSourceSender::PendingSend::GetData(uint32_t num_bytes) {
   DCHECK(!buffer_in_use_);
   buffer_in_use_ = true;
   data_.resize(num_bytes);
-  callback_.Run(scoped_ptr<WritableBuffer>(
+  callback_.Run(std::unique_ptr<WritableBuffer>(
       new Buffer(sender_, this, &data_[0], num_bytes)));
 }