Extension activity log database refactoring (step 2)

chrome/browser/extensions/activity_log/stream_noargs_ui_policy.cc

 // 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.
 
 #include "base/json/json_string_value_serializer.h"
 #include "chrome/browser/extensions/activity_log/stream_noargs_ui_policy.h"
 
 namespace extensions {
 
 StreamWithoutArgsUIPolicy::StreamWithoutArgsUIPolicy(Profile* profile)
     : FullStreamUIPolicy(profile) {
   for (int i = 0; i < APIAction::kSizeAlwaysLog; i++) {
     arg_whitelist_api_.insert(APIAction::kAlwaysLog[i]);
   }
 }
 
 StreamWithoutArgsUIPolicy::~StreamWithoutArgsUIPolicy() {}
 
-std::string StreamWithoutArgsUIPolicy::ProcessArguments(
+scoped_ptr<base::ListValue> StreamWithoutArgsUIPolicy::ProcessArguments(
     ActionType action_type,
     const std::string& name,
     const base::ListValue* args) const {
   if (action_type == ACTION_DOM ||
       arg_whitelist_api_.find(name) != arg_whitelist_api_.end()) {
-    return FullStreamUIPolicy::ProcessArguments(action_type, name, args);
+    return FullStreamUIPolicy::ProcessArguments(action_type, name, args).Pass();
   } else {
-    return std::string();
+    return make_scoped_ptr(new ListValue());
   }
 }
 
 void StreamWithoutArgsUIPolicy::ProcessWebRequestModifications(
     base::DictionaryValue& details,
     std::string& details_string) const {
   // Strip details of the web request modifications (for privacy reasons).
   DictionaryValue::Iterator details_iterator(details);
   while (!details_iterator.IsAtEnd()) {
     details.SetBoolean(details_iterator.key(), true);
     details_iterator.Advance();
   }
   JSONStringValueSerializer serializer(&details_string);
   serializer.SerializeAndOmitBinaryValues(details);
 }
 
 }  // namespace extensions