Remove raw base::DictionaryValue::Set

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>
 
@@ skipping 792 matching lines @@
   [jsAutofillManager_ fillActiveFormField:base::SysUTF8ToNSString(dataString)
                         completionHandler:suggestionHandledCompletion_];
   suggestionHandledCompletion_ = nil;
 }
 
 - (void)onFormDataFilled:(const autofill::FormData&)form {
   std::unique_ptr<base::DictionaryValue> formData(new base::DictionaryValue);
   formData->SetString("formName", base::UTF16ToUTF8(form.name));
   // Note: Destruction of all child base::Value types is handled by the root
   // formData object on its own destruction.
-  base::DictionaryValue* fieldsData = new base::DictionaryValue;
+  auto fieldsData = base::MakeUnique<base::DictionaryValue>();
 
   const std::vector<autofill::FormFieldData>& fields = form.fields;
   for (const auto& fieldData : fields) {
     fieldsData->SetStringWithoutPathExpansion(base::UTF16ToUTF8(fieldData.name),
                                               fieldData.value);
   }
-  formData->Set("fields", fieldsData);
+  formData->Set("fields", std::move(fieldsData));
 
   // Stringify the JSON data and send it to the UIWebView-side fillForm method.
   std::string dataString;
   base::JSONWriter::Write(*formData.get(), &dataString);
 
   // It is possible that the fill was not initiated by selecting a suggestion.
   // In this case we provide an empty callback.
   if (!suggestionHandledCompletion_)
     suggestionHandledCompletion_ = [^{
     } copy];
@@ skipping 42 matching lines @@
     }
     predictionData.SetWithoutPathExpansion(base::UTF16ToUTF8(formData.name),
                                            std::move(formJSONData));
   }
   std::string dataString;
   base::JSONWriter::Write(predictionData, &dataString);
   [jsAutofillManager_ fillPredictionData:base::SysUTF8ToNSString(dataString)];
 }
 
 @end