Convert //ash from scoped_ptr to std::unique_ptr

ash/display/json_converter.cc

 // Copyright 2016 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 "ash/display/json_converter.h"
 
+#include <memory>
 #include <string>
 
 #include "ash/display/display_pref_util.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "ui/display/manager/display_layout.h"
 
 namespace ash {
 
@@ skipping 154 matching lines @@
 bool DisplayLayoutToJson(const display::DisplayLayout& layout,
                          base::Value* value) {
   base::DictionaryValue* dict_value = nullptr;
   if (!value->GetAsDictionary(&dict_value))
     return false;
 
   dict_value->SetBoolean(kMirroredKey, layout.mirrored);
   dict_value->SetBoolean(kDefaultUnifiedKey, layout.default_unified);
   dict_value->SetString(kPrimaryIdKey, base::Int64ToString(layout.primary_id));
 
-  scoped_ptr<base::ListValue> placement_list(new base::ListValue);
+  std::unique_ptr<base::ListValue> placement_list(new base::ListValue);
   for (const auto& placement : layout.placement_list) {
-    scoped_ptr<base::DictionaryValue> placement_value(
+    std::unique_ptr<base::DictionaryValue> placement_value(
         new base::DictionaryValue);
     placement_value->SetString(
         kPositionKey,
         display::DisplayPlacement::PositionToString(placement.position));
     placement_value->SetInteger(kOffsetKey, placement.offset);
     placement_value->SetString(kDisplayPlacementDisplayIdKey,
                                base::Int64ToString(placement.display_id));
     placement_value->SetString(
         kDisplayPlacementParentDisplayIdKey,
         base::Int64ToString(placement.parent_display_id));
     placement_list->Append(std::move(placement_value));
   }
   dict_value->Set(kDisplayPlacementKey, std::move(placement_list));
   return true;
 }
 
 }  // namespace ash