Set up the infrastructure for Extension event metrics.

chrome/browser/extensions/api/notifications/notifications_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 "chrome/browser/extensions/api/notifications/notifications_api.h"
 
 #include "base/callback.h"
 #include "base/guid.h"
 #include "base/rand_util.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 166 matching lines @@
 
  private:
   ~NotificationsApiDelegate() override {}
 
   void SendEvent(const std::string& name,
                  EventRouter::UserGestureState user_gesture,
                  scoped_ptr<base::ListValue> args) {
     if (!event_router_)
       return;
 
-    scoped_ptr<Event> event(new Event(name, args.Pass()));
+    scoped_ptr<Event> event(new Event(events::UNKNOWN, name, args.Pass()));
     event->user_gesture = user_gesture;
     event_router_->DispatchEventToExtension(extension_id_, event.Pass());
   }
 
   void Shutdown() {
     event_router_ = nullptr;
     shutdown_notifier_subscription_.reset();
   }
 
   scoped_ptr<base::ListValue> CreateBaseEventArgs() {
@@ skipping 485 matching lines @@
           ? api::notifications::PERMISSION_LEVEL_GRANTED
           : api::notifications::PERMISSION_LEVEL_DENIED;
 
   SetResult(new base::StringValue(api::notifications::ToString(result)));
   SendResponse(true);
 
   return true;
 }
 
 }  // namespace extensions