base: Add three helper functions to Values API.

chrome/browser/automation/automation_provider_observers.cc

 // Copyright (c) 2011 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 "chrome/browser/automation/automation_provider_observers.h"
 
 #include <deque>
 #include <string>
 #include <vector>
 
@@ skipping 123 matching lines @@
 DictionaryValue* InitialLoadObserver::GetTimingInformation() const {
   ListValue* items = new ListValue;
   for (TabTimeMap::const_iterator it = loading_tabs_.begin();
        it != loading_tabs_.end();
        ++it) {
     DictionaryValue* item = new DictionaryValue;
     base::TimeDelta delta_start = it->second.start_time() - init_time_;
 
     item->SetDouble("load_start_ms", delta_start.InMillisecondsF());
     if (it->second.stop_time().is_null()) {
-      item->Set("load_stop_ms", Value::CreateNullValue());
+      item->Set("load_stop_ms", base::NullValue());
     } else {
       base::TimeDelta delta_stop = it->second.stop_time() - init_time_;
       item->SetDouble("load_stop_ms", delta_stop.InMillisecondsF());
     }
     items->Append(item);
   }
   DictionaryValue* return_value = new DictionaryValue;
   return_value->Set("tabs", items);
   return return_value;
 }
@@ skipping 2459 matching lines @@
 void DragTargetDropAckNotificationObserver::Observe(
     int type,
     const NotificationSource& source,
     const NotificationDetails& details) {
   if (automation_) {
     AutomationJSONReply(automation_,
                         reply_message_.release()).SendSuccess(NULL);
   }
   delete this;
 }