Dispatch push event to worker from PushServiceImpl#OnMessage.

components/gcm_driver/gcm_driver_desktop.cc

 // Copyright 2014 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 "components/gcm_driver/gcm_driver_desktop.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 617 matching lines @@
   gcm_started_ = false;
   gcm_client_ready_ = false;
   delayed_task_controller_.reset();
   ClearCallbacks();
 }
 
 void GCMDriverDesktop::MessageReceived(
     const std::string& app_id,
     const GCMClient::IncomingMessage& message) {
   DCHECK(ui_thread_->RunsTasksOnCurrentThread());
-
+  LOG(WARNING) << "Message received for appid: " << app_id;
   // Drop the event if the service has been stopped.
   if (!gcm_started_)
     return;
 
   GetAppHandler(app_id)->OnMessage(app_id, message);
 }
 
 void GCMDriverDesktop::MessagesDeleted(const std::string& app_id) {
   DCHECK(ui_thread_->RunsTasksOnCurrentThread());
 
@@ skipping 68 matching lines @@
 
   // Normally request_gcm_statistics_callback_ would not be null.
   if (!request_gcm_statistics_callback_.is_null())
     request_gcm_statistics_callback_.Run(stats);
   else
     LOG(WARNING) << "request_gcm_statistics_callback_ is NULL.";
 }
 
 }  // namespace gcm