[GCM] Adding the OnSendAcknowledgement event

chrome/browser/extensions/extension_gcm_app_handler.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_GCM_APP_HANDLER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_GCM_APP_HANDLER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 36 matching lines @@
 
   // gcm::GCMAppHandler implementation.
   virtual void ShutdownHandler() OVERRIDE;
   virtual void OnMessage(
       const std::string& app_id,
       const gcm::GCMClient::IncomingMessage& message) OVERRIDE;
   virtual void OnMessagesDeleted(const std::string& app_id) OVERRIDE;
   virtual void OnSendError(
       const std::string& app_id,
       const gcm::GCMClient::SendErrorDetails& send_error_details) OVERRIDE;
+  virtual void OnSendAcknowledged(const std::string& app_id,
+                                  const std::string& message_id) OVERRIDE;
 
  protected:
   // Could be overridden by testing purpose.
   virtual void OnUnregisterCompleted(const std::string& app_id,
                                      gcm::GCMClient::Result result);
   virtual void AddAppHandler(const std::string& app_id);
   virtual void RemoveAppHandler(const std::string& app_id);
 
   gcm::GCMDriver* GetGCMDriver() const;
 
@@ skipping 30 matching lines @@
 #endif
 
   base::WeakPtrFactory<ExtensionGCMAppHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionGCMAppHandler);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_GCM_APP_HANDLER_H_