Introduce ServiceWorker.EventDispatchingDelay UMA

content/browser/background_sync/background_sync_manager.cc

 // Copyright 2015 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 "content/browser/background_sync/background_sync_manager.h"
 
 #include <utility>
 
 #include "base/barrier_closure.h"
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/default_clock.h"
+#include "base/time/time.h"
 #include "build/build_config.h"
 #include "content/browser/background_sync/background_sync_metrics.h"
 #include "content/browser/background_sync/background_sync_network_observer.h"
 #include "content/browser/background_sync/background_sync_registration_options.h"
 #include "content/browser/service_worker/embedded_worker_status.h"
 #include "content/browser/service_worker/service_worker_context_wrapper.h"
 #include "content/browser/service_worker/service_worker_storage.h"
 #include "content/browser/storage_partition_impl.h"
 #include "content/common/service_worker/service_worker_type_converters.h"
 #include "content/public/browser/background_sync_controller.h"
@@ skipping 116 matching lines @@
     return parameters;
   }
 
   background_sync_controller->GetParameterOverrides(parameters.get());
   return parameters;
 }
 
 void OnSyncEventFinished(scoped_refptr<ServiceWorkerVersion> active_version,
                          int request_id,
                          const ServiceWorkerVersion::StatusCallback& callback,
-                         blink::mojom::ServiceWorkerEventStatus status) {
+                         blink::mojom::ServiceWorkerEventStatus status,
+                         double dispatch_event_time) {
   if (!active_version->FinishRequest(
           request_id,
-          status == blink::mojom::ServiceWorkerEventStatus::COMPLETED)) {
+          status == blink::mojom::ServiceWorkerEventStatus::COMPLETED,
+          base::Time::FromDoubleT(dispatch_event_time))) {
     return;
   }
   callback.Run(mojo::ConvertTo<ServiceWorkerStatusCode>(status));
 }
 
 }  // namespace
 
 BackgroundSyncManager::BackgroundSyncRegistrations::
     BackgroundSyncRegistrations()
     : next_id(BackgroundSyncRegistration::kInitialId) {
@@ skipping 1022 matching lines @@
   parameters_->max_sync_attempts = max_attempts;
   base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE, callback);
 }
 
 base::Closure BackgroundSyncManager::MakeEmptyCompletion() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   return op_scheduler_.WrapCallbackToRunNext(base::Bind(&base::DoNothing));
 }
 
 }  // namespace content