Set up the infrastructure for Extension event metrics.

extensions/browser/api/web_request/web_request_api.cc

 // Copyright (c) 2012 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/web_request/web_request_api.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 341 matching lines @@
   // process. We use a filter here so that only event listeners for a particular
   // <webview> will fire.
   if (is_web_view_guest) {
     event_filtering_info.SetInstanceID(web_view_info.instance_id);
     event_name = webview::kEventMessage;
   } else {
     event_name = declarative_keys::kOnMessage;
   }
 
   scoped_ptr<extensions::Event> event(new extensions::Event(
-      event_name,
-      event_args.Pass(), browser_context, GURL(),
-      extensions::EventRouter::USER_GESTURE_UNKNOWN,
+      extensions::events::UNKNOWN, event_name, event_args.Pass(),
+      browser_context, GURL(), extensions::EventRouter::USER_GESTURE_UNKNOWN,
       event_filtering_info));
   event_router->DispatchEventToExtension(extension_id, event.Pass());
 }
 
 void RemoveEventListenerOnIOThread(
     void* browser_context,
     const std::string& extension_id,
     const std::string& sub_event_name,
     int embedder_process_id,
     int web_view_instance_id) {
@@ skipping 2083 matching lines @@
       base::Bind(&WarningService::NotifyWarningsOnUI, profile_id(), warnings));
 
   // Continue gracefully.
   RunSync();
 }
 
 bool WebRequestHandlerBehaviorChangedFunction::RunSync() {
   helpers::ClearCacheOnNavigation();
   return true;
 }