Refactor extension event distribution to use Values instead of JSON strings.

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 "chrome/browser/extensions/event_router.h"
 #include "chrome/browser/profiles/profile.h"
 
 ExtensionMediaPlayerEventRouter::ExtensionMediaPlayerEventRouter()
     : profile_(NULL) {
 }
 
 ExtensionMediaPlayerEventRouter*
     ExtensionMediaPlayerEventRouter::GetInstance() {
   return Singleton<ExtensionMediaPlayerEventRouter>::get();
 }
 
 void ExtensionMediaPlayerEventRouter::Init(Profile* profile) {
   profile_ = profile;
 }
 
 void ExtensionMediaPlayerEventRouter::NotifyPlaylistChanged() {
   if (profile_ && profile_->GetExtensionEventRouter()) {
+    scoped_ptr<ListValue> args(new ListValue());
     profile_->GetExtensionEventRouter()->DispatchEventToRenderers(
-      "mediaPlayerPrivate.onPlaylistChanged", "[]", NULL, GURL());
+      "mediaPlayerPrivate.onPlaylistChanged", args.Pass(), NULL, GURL());
   }
 }