Remove ListValue::Append(new {Fundamental,String}Value(...)) pattern in //extensions

extensions/browser/extension_prefs.cc

Index: extensions/browser/extension_prefs.cc
diff --git a/extensions/browser/extension_prefs.cc b/extensions/browser/extension_prefs.cc
index 5e77c0c250c2e13f7f7190e84cc09d9731715ec3..13820316ec9cb0badd3b6f172043b0c5ad92ad17 100644
--- a/extensions/browser/extension_prefs.cc
+++ b/extensions/browser/extension_prefs.cc
@@ -632,7 +632,7 @@ static base::ListValue* CreatePermissionList(const T& permissions) {
       tmp->Set(i->name(), detail.release());
       values->Append(tmp);
     } else {
-      values->Append(new base::StringValue(i->name()));
+      values->AppendString(i->name());
     }
   }
   return values;
@@ -1838,7 +1838,7 @@ void ExtensionPrefs::SetExtensionPrefFromContainer(
   list_of_values->Clear();
   for (typename ExtensionIdContainer::const_iterator iter = strings.begin();
        iter != strings.end(); ++iter) {
-    list_of_values->Append(new base::StringValue(*iter));
+    list_of_values->AppendString(*iter);
   }
 }