Set up the infrastructure for Extension event metrics.

extensions/browser/api/vpn_provider/vpn_service.cc

 // Copyright 2014 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 "extensions/browser/api/vpn_provider/vpn_service.h"
 
 #include <stdint.h>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 500 matching lines @@
     const VpnService::FailureCallback& callback,
     const std::string& error_name,
     scoped_ptr<base::DictionaryValue> error_data) {
   callback.Run(error_name, std::string());
 }
 
 void VpnService::SendSignalToExtension(const std::string& extension_id,
                                        const std::string& event_name,
                                        scoped_ptr<base::ListValue> event_args) {
   scoped_ptr<extensions::Event> event(
-      new extensions::Event(event_name, event_args.Pass(), browser_context_));
+      new extensions::Event(extensions::events::UNKNOWN, event_name,
+                            event_args.Pass(), browser_context_));
 
   event_router_->DispatchEventToExtension(extension_id, event.Pass());
 }
 
 void VpnService::SetActiveConfiguration(
     VpnService::VpnConfiguration* configuration) {
   active_configuration_ = configuration;
 }
 
 VpnService::VpnConfiguration* VpnService::CreateConfigurationInternal(
@@ skipping 20 matching lines @@
   delete configuration;
 }
 
 bool VpnService::DoesActiveConfigurationExistAndIsAccessAuthorized(
     const std::string& extension_id) {
   return active_configuration_ &&
          active_configuration_->extension_id() == extension_id;
 }
 
 }  // namespace chromeos