[GCM] Add app handler support for connection events

components/invalidation/gcm_invalidation_bridge.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 "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "components/gcm_driver/gcm_driver.h"
 #include "components/invalidation/gcm_invalidation_bridge.h"
@@ skipping 298 matching lines @@
   // callback so this should be no-op in desktop version as well.
 }
 
 void GCMInvalidationBridge::OnSendError(
     const std::string& app_id,
     const gcm::GCMClient::SendErrorDetails& send_error_details) {
   // cacheinvalidation doesn't send messages over GCM.
   NOTREACHED();
 }
 
+void GCMInvalidationBridge::OnConnected(const net::IPEndPoint& ip_endpoint) {
+  // TODO(pavely): update invalidator state.
+}
+
+void GCMInvalidationBridge::OnDisconnected() {
+  // TODO(pavely): update invalidator state.
+}
+
+
 }  // namespace invalidation