[GCM] Add app handler support for connection events

components/gcm_driver/gcm_driver_desktop.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_DRIVER_DESKTOP_H_
 #define COMPONENTS_GCM_DRIVER_GCM_DRIVER_DESKTOP_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 48 matching lines @@
   virtual void AddAppHandler(const std::string& app_id,
                              GCMAppHandler* handler) OVERRIDE;
   virtual void RemoveAppHandler(const std::string& app_id) OVERRIDE;
 
   // GCMDriver implementation:
   virtual void Enable() OVERRIDE;
   virtual void Disable() OVERRIDE;
   virtual GCMClient* GetGCMClientForTesting() const OVERRIDE;
   virtual bool IsStarted() const OVERRIDE;
   virtual bool IsGCMClientReady() const OVERRIDE;
+  virtual bool IsConnected() const OVERRIDE;
   virtual void GetGCMStatistics(const GetGCMStatisticsCallback& callback,
                                 bool clear_logs) OVERRIDE;
   virtual void SetGCMRecording(const GetGCMStatisticsCallback& callback,
                                bool recording) OVERRIDE;
   virtual std::string SignedInUserName() const OVERRIDE;
 
  protected:
   // GCMDriver implementation:
   virtual GCMClient::Result EnsureStarted() OVERRIDE;
   virtual void RegisterImpl(
@@ skipping 24 matching lines @@
               const std::string& receiver_id,
               const GCMClient::OutgoingMessage& message);
 
   // Callbacks posted from IO thread to UI thread.
   void MessageReceived(const std::string& app_id,
                        const GCMClient::IncomingMessage& message);
   void MessagesDeleted(const std::string& app_id);
   void MessageSendError(const std::string& app_id,
                         const GCMClient::SendErrorDetails& send_error_details);
   void GCMClientReady();
+  void OnConnected(const net::IPEndPoint& ip_endpoint);
+  void OnDisconnected();
 
   void GetGCMStatisticsFinished(const GCMClient::GCMStatistics& stats);
 
   // Flag to indicate if GCM is enabled.
   bool gcm_enabled_;
 
   // Flag to indicate if GCMClient is ready.
   bool gcm_client_ready_;
 
+  // Flag to indicate the last known state of the GCM client. Because this
+  // flag lives on the UI thread, while the GCM client lives on the IO thread,
+  // it may be out of date while connection changes are happening.
+  bool connected_;
+
   // The account ID that this service is responsible for. Empty when the service
   // is not running.
   std::string account_id_;
 
   scoped_ptr<IdentityProvider> identity_provider_;
   scoped_refptr<base::SequencedTaskRunner> ui_thread_;
   scoped_refptr<base::SequencedTaskRunner> io_thread_;
 
   scoped_ptr<DelayedTaskController> delayed_task_controller_;
 
   // For all the work occurring on the IO thread. Must be destroyed on the IO
   // thread.
   scoped_ptr<IOWorker> io_worker_;
 
   // Callback for GetGCMStatistics.
   GetGCMStatisticsCallback request_gcm_statistics_callback_;
 
   // Used to pass a weak pointer to the IO worker.
   base::WeakPtrFactory<GCMDriverDesktop> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMDriverDesktop);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_DRIVER_DESKTOP_H_