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

chrome/browser/extensions/api/push_messaging/push_messaging_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/push_messaging/push_messaging_api.h"
 
 #include "base/bind.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/event_names.h"
 #include "chrome/browser/extensions/event_router.h"
@@ skipping 16 matching lines @@
   // TODO(dcheng): Add hooks into InvalidationHandler when landed.
 }
 
 void PushMessagingEventRouter::OnMessage(const std::string& extension_id,
                                          int subchannel,
                                          const std::string& payload) {
   glue::Message message;
   message.subchannel_id = subchannel;
   message.payload = payload;
 
-  scoped_ptr<base::Value> parameters(glue::OnMessage::Create(message));
+  scoped_ptr<base::ListValue> args(glue::OnMessage::Create(message));
   profile_->GetExtensionEventRouter()->DispatchEventToExtension(
       extension_id,
       event_names::kOnPushMessage,
-      *parameters.get(),
+      args.Pass(),
       profile_,
       GURL());
 }
 
 }  // namespace extensions