[GCM] Adding the OnSendAcknowledgement event

components/gcm_driver/fake_gcm_app_handler.cc

Index: components/gcm_driver/fake_gcm_app_handler.cc
diff --git a/components/gcm_driver/fake_gcm_app_handler.cc b/components/gcm_driver/fake_gcm_app_handler.cc
index a2ccbb08d3b433b95de0e67346d5684234030cb2..40258eb47bc59280f6d724d4d30f465c35aedb0c 100644
--- a/components/gcm_driver/fake_gcm_app_handler.cc
+++ b/components/gcm_driver/fake_gcm_app_handler.cc
@@ -53,9 +53,20 @@ void FakeGCMAppHandler::OnSendError(
     run_loop_->Quit();
 }
 
+void FakeGCMAppHandler::OnSendAcknowledged(
+    const std::string& app_id,
+    const std::string& message_id) {
+  ClearResults();
+  app_id_ = app_id;
+  acked_message_id_ = message_id;
+  if (run_loop_)
+    run_loop_->Quit();
+}
+
 void FakeGCMAppHandler::ClearResults() {
   received_event_ = NO_EVENT;
   app_id_.clear();
+  acked_message_id_.clear();
   message_ = GCMClient::IncomingMessage();
   send_error_details_ = GCMClient::SendErrorDetails();
 }