[GCM] Add app handler support for connection events

components/gcm_driver/gcm_client.h

 // 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.
 
 #ifndef COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_
 #define COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/gcm_driver/gcm_activity.h"
 
 template <class T> class scoped_refptr;
 
+class GURL;
+
 namespace base {
 class FilePath;
 class SequencedTaskRunner;
 }
 
 namespace net {
+class IPEndPoint;
 class URLRequestContextGetter;
 }
 
 namespace gcm {
 
 class Encryptor;
 
 // Interface that encapsulates the network communications with the Google Cloud
 // Messaging server. This interface is not supposed to be thread-safe.
 class GCMClient {
@@ skipping 148 matching lines @@
         const SendErrorDetails& send_error_details) = 0;
 
     // Called when the GCM becomes ready. To get to this state, GCMClient
     // finished loading from the GCM store and retrieved the device check-in
     // from the server if it hadn't yet.
     virtual void OnGCMReady() = 0;
 
     // Called when activities are being recorded and a new activity has just
     // been recorded.
     virtual void OnActivityRecorded() = 0;
+
+    // Called when a new connection is established and a successful handshake
+    // has been performed.
+    virtual void OnConnected(const net::IPEndPoint& ip_endpoint) = 0;
+
+    // Called when the connection is interrupted.
+    virtual void OnDisconnected() = 0;
   };
 
   GCMClient();
   virtual ~GCMClient();
 
   // Begins initialization of the GCM Client. This will not trigger a
   // connection.
   // |chrome_build_info|: chrome info, i.e., version, channel and etc.
   // |store_path|: path to the GCM store.
   // |account_ids|: account IDs to be related to the device when checking in.
@@ skipping 53 matching lines @@
   // Clear all recorded GCM activity logs.
   virtual void ClearActivityLogs() = 0;
 
   // Gets internal states and statistics.
   virtual GCMStatistics GetStatistics() const = 0;
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_