[GCM] Extracting GCMConnectionObserver from GCMAppHandler

components/gcm_driver/gcm_app_handler.h

Index: components/gcm_driver/gcm_app_handler.h
diff --git a/components/gcm_driver/gcm_app_handler.h b/components/gcm_driver/gcm_app_handler.h
index 04d1abf7b274c5cf3e4160373cb8813407e0150b..4a841f30bcffbeede5af22bbec59dce5d398b62f 100644
--- a/components/gcm_driver/gcm_app_handler.h
+++ b/components/gcm_driver/gcm_app_handler.h
@@ -40,16 +40,6 @@ class GCMAppHandler {
   virtual void OnSendAcknowledged(const std::string& app_id,
                                   const std::string& message_id) = 0;
 
-  // Called when a new connection is established and a successful handshake
-  // has been performed. Note that |ip_endpoint| is only set if available for
-  // the current platform.
-  // Default implementation does nothing.
-  virtual void OnConnected(const net::IPEndPoint& ip_endpoint);
-
-  // Called when the connection is interrupted.
-  // Default implementation does nothing.
-  virtual void OnDisconnected();
-
   // If no app handler has been added with the exact app_id of an incoming
   // event, all handlers will be asked (in arbitrary order) whether they can
   // handle the app_id, and the first to return true will receive the event.