Extension activity log database refactoring (step 2)

chrome/browser/extensions/activity_log/stream_noargs_ui_policy.cc

Index: chrome/browser/extensions/activity_log/stream_noargs_ui_policy.cc
diff --git a/chrome/browser/extensions/activity_log/stream_noargs_ui_policy.cc b/chrome/browser/extensions/activity_log/stream_noargs_ui_policy.cc
index c30d33dd414c6f8d3604fed41507ab6094c24c18..180b8023d599070a4af63961efd457c458e0137b 100644
--- a/chrome/browser/extensions/activity_log/stream_noargs_ui_policy.cc
+++ b/chrome/browser/extensions/activity_log/stream_noargs_ui_policy.cc
@@ -16,15 +16,15 @@ StreamWithoutArgsUIPolicy::StreamWithoutArgsUIPolicy(Profile* profile)
 
 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());
   }
 }