[GCM] Extracting GCMConnectionObserver from GCMAppHandler

components/gcm_driver/gcm_app_handler.cc

Index: components/gcm_driver/gcm_app_handler.cc
diff --git a/components/gcm_driver/gcm_app_handler.cc b/components/gcm_driver/gcm_app_handler.cc
index ed00cbe1e3ffebf9ccb03f67cb34a313cd853d57..d7c66f3b0549707d5fb2554df1c87bcf1fc3bf4d 100644
--- a/components/gcm_driver/gcm_app_handler.cc
+++ b/components/gcm_driver/gcm_app_handler.cc
@@ -9,12 +9,6 @@ namespace gcm {
 GCMAppHandler::GCMAppHandler() {}
 GCMAppHandler::~GCMAppHandler() {}
 
-void GCMAppHandler::OnConnected(const net::IPEndPoint& ip_endpoint) {
-}
-
-void GCMAppHandler::OnDisconnected() {
-}
-
 bool GCMAppHandler::CanHandle(const std::string& app_id) const {
   return false;
 }