Remove raw base::DictionaryValue::SetWithoutPathExpansion

ios/chrome/browser/autofill/autofill_agent.mm

 // Copyright 2013 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.
 
 #import "ios/chrome/browser/autofill/autofill_agent.h"
 
 #include <memory>
 #include <string>
+#include <utility>
 
 #include "base/format_macros.h"
 #include "base/guid.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_block.h"
+#include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string16.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "components/autofill/core/browser/autofill_manager.h"
 #include "components/autofill/core/browser/autofill_metrics.h"
 #include "components/autofill/core/browser/autofill_profile.h"
 #include "components/autofill/core/browser/credit_card.h"
 #include "components/autofill/core/browser/keyboard_accessory_metrics_logger.h"
@@ skipping 827 matching lines @@
     }
   }
 
   return nil;
 }
 
 - (void)renderAutofillTypePredictions:
     (const std::vector<autofill::FormStructure*>&)structure {
   base::DictionaryValue predictionData;
   for (autofill::FormStructure* form : structure) {
-    // |predictionData| will take ownership below.
-    base::DictionaryValue* formJSONData = new base::DictionaryValue;
+    auto formJSONData = base::MakeUnique<base::DictionaryValue>();
     autofill::FormData formData = form->ToFormData();
     for (const auto& field : *form) {
       autofill::AutofillType type(field->Type());
       if (type.IsUnknown())
         continue;
       formJSONData->SetStringWithoutPathExpansion(
           base::UTF16ToUTF8(field->name), type.ToString());
     }
     predictionData.SetWithoutPathExpansion(base::UTF16ToUTF8(formData.name),
-                                           formJSONData);
+                                           std::move(formJSONData));
   }
   std::string dataString;
   base::JSONWriter::Write(predictionData, &dataString);
   [jsAutofillManager_ fillPredictionData:base::SysUTF8ToNSString(dataString)];
 }
 
 @end