EDK: Convert remaining scoped_ptr -> std::unique_ptr in //mojo/edk/system.

mojo/edk/system/data_pipe_impl.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/edk/system/data_pipe_impl.h"
 
 #include <algorithm>
+#include <memory>
+#include <utility>
 
 #include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
 #include "mojo/edk/system/configuration.h"
 #include "mojo/edk/system/message_in_transit.h"
 #include "mojo/edk/system/message_in_transit_queue.h"
 
 namespace mojo {
 namespace system {
 
 void DataPipeImpl::ConvertDataToMessages(const char* buffer,
                                          size_t* start_index,
                                          size_t* current_num_bytes,
                                          MessageInTransitQueue* message_queue) {
   // The maximum amount of data to send per message (make it a multiple of the
   // element size.
   size_t max_message_num_bytes = GetConfiguration().max_message_num_bytes;
   max_message_num_bytes -= max_message_num_bytes % element_num_bytes();
   DCHECK_GT(max_message_num_bytes, 0u);
 
   while (*current_num_bytes > 0) {
     size_t current_contiguous_num_bytes =
         (*start_index + *current_num_bytes > capacity_num_bytes())
             ? (capacity_num_bytes() - *start_index)
             : *current_num_bytes;
     size_t message_num_bytes =
         std::min(max_message_num_bytes, current_contiguous_num_bytes);
 
     // Note: |message_num_bytes| fits in a |uint32_t| since the capacity does.
-    scoped_ptr<MessageInTransit> message(new MessageInTransit(
+    std::unique_ptr<MessageInTransit> message(new MessageInTransit(
         MessageInTransit::Type::ENDPOINT_CLIENT,
         MessageInTransit::Subtype::ENDPOINT_CLIENT_DATA,
         static_cast<uint32_t>(message_num_bytes), buffer + *start_index));
-    message_queue->AddMessage(message.Pass());
+    message_queue->AddMessage(std::move(message));
 
     DCHECK_LE(message_num_bytes, *current_num_bytes);
     *start_index += message_num_bytes;
     *start_index %= capacity_num_bytes();
     *current_num_bytes -= message_num_bytes;
   }
 }
 
 }  // namespace system
 }  // namespace mojo