[GCM] Adding the OnSendAcknowledgement event

components/gcm_driver/gcm_client_impl.cc

 // 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.
 
 #include "components/gcm_driver/gcm_client_impl.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 839 matching lines @@
                                        MCSClient::MessageSendStatus status) {
   DCHECK_EQ(user_serial_number, kDefaultUserSerialNumber);
   DCHECK(delegate_);
 
   // TTL_EXCEEDED is singled out here, because it can happen long time after the
   // message was sent. That is why it comes as |OnMessageSendError| event rather
   // than |OnSendFinished|. SendErrorDetails.additional_data is left empty.
   // All other errors will be raised immediately, through asynchronous callback.
   // It is expected that TTL_EXCEEDED will be issued for a message that was
   // previously issued |OnSendFinished| with status SUCCESS.
-  // For now, we do not report that the message has been sent and acked
-  // successfully.
   // TODO(jianli): Consider adding UMA for this status.
   if (status == MCSClient::TTL_EXCEEDED) {
     SendErrorDetails send_error_details;
     send_error_details.message_id = message_id;
     send_error_details.result = GCMClient::TTL_EXCEEDED;
     delegate_->OnMessageSendError(app_id, send_error_details);
-  } else if (status != MCSClient::SENT) {
+  } else if (status == MCSClient::SENT) {
+    delegate_->OnSendAcknowledged(app_id, message_id);
+  } else {
     delegate_->OnSendFinished(app_id, message_id, ToGCMClientResult(status));
   }
 }
 
 void GCMClientImpl::OnMCSError() {
   // TODO(fgorski): For now it replaces the initialization method. Long term it
   // should have an error or status passed in.
 }
 
 void GCMClientImpl::HandleIncomingMessage(const gcm::MCSMessage& message) {
@@ skipping 87 matching lines @@
 
   recorder_.RecordIncomingSendError(
       data_message_stanza.category(),
       data_message_stanza.to(),
       data_message_stanza.id());
   delegate_->OnMessageSendError(data_message_stanza.category(),
                                 send_error_details);
 }
 
 }  // namespace gcm