Set up the infrastructure for Extension event metrics.

chrome/browser/chromeos/extensions/media_player_event_router.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/chromeos/extensions/media_player_event_router.h"
 
 #include "base/memory/singleton.h"
 #include "content/public/browser/browser_context.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/extension_system.h"
 
 namespace extensions {
 
 static void BroadcastEvent(content::BrowserContext* context,
                            const std::string& event_name) {
   if (context && EventRouter::Get(context)) {
     scoped_ptr<base::ListValue> args(new base::ListValue());
     scoped_ptr<extensions::Event> event(new extensions::Event(
-        event_name, args.Pass()));
+        extensions::events::UNKNOWN, event_name, args.Pass()));
     EventRouter::Get(context)->BroadcastEvent(event.Pass());
   }
 }
 
 MediaPlayerEventRouter::MediaPlayerEventRouter(content::BrowserContext* context)
     : browser_context_(context) {}
 
 MediaPlayerEventRouter::~MediaPlayerEventRouter() {
 }
 
 void MediaPlayerEventRouter::NotifyNextTrack() {
   BroadcastEvent(browser_context_, "mediaPlayerPrivate.onNextTrack");
 }
 
 void MediaPlayerEventRouter::NotifyPrevTrack() {
   BroadcastEvent(browser_context_, "mediaPlayerPrivate.onPrevTrack");
 }
 
 void MediaPlayerEventRouter::NotifyTogglePlayState() {
   BroadcastEvent(browser_context_, "mediaPlayerPrivate.onTogglePlayState");
 }
 
 }  // namespace extensions