Make DictionaryValue::DeepCopyWithoutEmptyChildren return a scoped_ptr

chrome/browser/prefs/tracked/pref_hash_calculator.cc

Index: chrome/browser/prefs/tracked/pref_hash_calculator.cc
diff --git a/chrome/browser/prefs/tracked/pref_hash_calculator.cc b/chrome/browser/prefs/tracked/pref_hash_calculator.cc
index 455e5c95bbb0b438edbc83a26e51c6d2c3447eea..323eb8832f0e8463feb8aa398a2a802ef3641f08 100644
--- a/chrome/browser/prefs/tracked/pref_hash_calculator.cc
+++ b/chrome/browser/prefs/tracked/pref_hash_calculator.cc
@@ -51,7 +51,7 @@ std::string ValueAsString(const base::Value* value) {
   const base::DictionaryValue* dict_value;
   scoped_ptr<base::DictionaryValue> canonical_dict_value;
   if (value && value->GetAsDictionary(&dict_value)) {
-    canonical_dict_value.reset(dict_value->DeepCopyWithoutEmptyChildren());
+    canonical_dict_value = dict_value->DeepCopyWithoutEmptyChildren();
     value = canonical_dict_value.get();
   }