[GCM] Add app handler support for connection events

components/gcm_driver/default_gcm_app_handler.cc

Index: components/gcm_driver/default_gcm_app_handler.cc
diff --git a/components/gcm_driver/default_gcm_app_handler.cc b/components/gcm_driver/default_gcm_app_handler.cc
index 80aee2f87ec89847ae31e743fbcd6ac68ed44d2d..2e745a031c8fac5d4a7699181be01d22eec47c93 100644
--- a/components/gcm_driver/default_gcm_app_handler.cc
+++ b/components/gcm_driver/default_gcm_app_handler.cc
@@ -5,6 +5,7 @@
 #include "components/gcm_driver/default_gcm_app_handler.h"
 
 #include "base/logging.h"
+#include "net/base/ip_endpoint.h"
 
 namespace gcm {
 
@@ -36,4 +37,14 @@ void DefaultGCMAppHandler::OnSendError(
              << 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