Remove more usage of the base::ListValue::Append(Value*) overload.

printing/print_settings_conversion.cc

Index: printing/print_settings_conversion.cc
diff --git a/printing/print_settings_conversion.cc b/printing/print_settings_conversion.cc
index 7cf5cf1dc2487cdebbfe1f6c2da7bfab470012a2..d8add5a8bcbdff8cb4167d9aa5b8ce852db82d5f 100644
--- a/printing/print_settings_conversion.cc
+++ b/printing/print_settings_conversion.cc
@@ -8,7 +8,9 @@
 
 #include <algorithm>
 #include <cmath>
+#include <memory>
 #include <string>
+#include <utility>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ -216,10 +218,10 @@ void PrintSettingsToJobSettingsDebug(const PrintSettings& settings,
     base::ListValue* page_range_array = new base::ListValue;
     job_settings->Set(kSettingPageRange, page_range_array);
     for (size_t i = 0; i < settings.ranges().size(); ++i) {
-      base::DictionaryValue* dict = new base::DictionaryValue;
-      page_range_array->Append(dict);
+      std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue);
       dict->SetInteger(kSettingPageRangeFrom, settings.ranges()[i].from + 1);
       dict->SetInteger(kSettingPageRangeTo, settings.ranges()[i].to + 1);
+      page_range_array->Append(std::move(dict));
     }
   }