Added VLOG(1) loggings to mdns extensions API code

chrome/browser/extensions/api/mdns/mdns_api.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 "chrome/browser/extensions/api/mdns/mdns_api.h"
 
 #include <vector>
 
 #include "base/lazy_instance.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 71 matching lines @@
 void MDnsAPI::UpdateMDnsListeners(const EventListenerInfo& details) {
   std::set<std::string> new_service_types;
 
   // Check all listeners for service type filers.
   const EventListenerMap::ListenerList& listeners =
       extensions::ExtensionSystem::Get(profile_)->event_router()->
           listeners().GetEventListenersByName(details.event_name);
   for (EventListenerMap::ListenerList::const_iterator it = listeners.begin();
        it != listeners.end(); ++it) {
     base::DictionaryValue* filter = ((*it)->filter.get());
+    // TODO(imcheng): Figure out what this is loop for, maybe remove it.
     for (base::DictionaryValue::Iterator iter(*filter);

[imcheng, 2014/01/15 21:22:38]

What this is for and can it be removed?

        !iter.IsAtEnd(); iter.Advance()) {
     }
 
     std::string filter_value;
     filter->GetStringASCII(kEventFilterServiceTypeKey, &filter_value);
     if (filter_value.empty())
       continue;
     new_service_types.insert(filter_value);
   }
 
@@ skipping 36 matching lines @@
     mdns_service->service_data = (*it).service_data;
     args.push_back(mdns_service);
   }
 
   scoped_ptr<base::ListValue> results = mdns::OnServiceList::Create(args);
   scoped_ptr<Event> event(
       new Event(mdns::OnServiceList::kEventName, results.Pass()));
   event->restrict_to_browser_context = profile_;
   event->filter_info.SetServiceType(service_type);
 
+  VLOG(1) << "Broadcasting OnServiceList event: " << event.get();
+
   // TODO(justinlin): To avoid having listeners without filters getting all
   // events, modify API to have this event require filters.
   extensions::ExtensionSystem::Get(profile_)->event_router()->
       BroadcastEvent(event.Pass());
 }
 
 }  // namespace extensions