[GCM] Add app handler support for connection events

components/gcm_driver/default_gcm_app_handler.cc

 // Copyright (c) 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/default_gcm_app_handler.h"
 
 #include "base/logging.h"
+#include "net/base/ip_endpoint.h"
 
 namespace gcm {
 
 DefaultGCMAppHandler::DefaultGCMAppHandler() {
 }
 
 DefaultGCMAppHandler::~DefaultGCMAppHandler() {
 }
 
 void DefaultGCMAppHandler::ShutdownHandler() {
@@ skipping 11 matching lines @@
              << app_id;
 }
 
 void DefaultGCMAppHandler::OnSendError(
     const std::string& app_id,
     const GCMClient::SendErrorDetails& send_error_details) {
   LOG(ERROR) << "No app handler is found to route send error message for "
              << app_id;
 }
 
+void DefaultGCMAppHandler::OnConnected(const net::IPEndPoint& ip_endpoint) {
+  // TODO(semenzato): update CrOS NIC state.
+  DVLOG(1) << "GCM connected to " << ip_endpoint.ToString();
+}
+
+void DefaultGCMAppHandler::OnDisconnected() {
+  // TODO(semenzato): update CrOS NIC state.
+  DVLOG(1) << "GCM disconnected";
+}
+
 }  // namespace gcm