[GCM] Adding the OnSendAcknowledgement event

components/invalidation/gcm_invalidation_bridge.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_INVALIDATION_GCM_INVALIDATION_BRIDGE_H_
 #define COMPONENTS_INVALIDATION_GCM_INVALIDATION_BRIDGE_H_
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 39 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;
   virtual void OnConnected(const net::IPEndPoint& ip_endpoint) OVERRIDE;
   virtual void OnDisconnected() OVERRIDE;
 
   scoped_ptr<syncer::GCMNetworkChannelDelegate> CreateDelegate();
 
   void CoreInitializationDone(
       base::WeakPtr<Core> core,
       scoped_refptr<base::SingleThreadTaskRunner> core_thread_task_runner);
 
   // Functions reflecting GCMNetworkChannelDelegate interface. These are called
@@ skipping 25 matching lines @@
   bool subscribed_for_incoming_messages_;
 
   base::WeakPtrFactory<GCMInvalidationBridge> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMInvalidationBridge);
 };
 
 }  // namespace invalidation
 
 #endif  // COMPONENTS_INVALIDATION_GCM_INVALIDATION_BRIDGE_H_