Introduce ServiceWorker.EventDispatchingDelay UMA

content/browser/service_worker/service_worker_dispatcher_host_unittest.cc

 // Copyright 2013 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/service_worker/service_worker_dispatcher_host.h"
 
 #include <stdint.h>
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
+#include "base/time/time.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/message_port_service.h"
 #include "content/browser/service_worker/embedded_worker_instance.h"
 #include "content/browser/service_worker/embedded_worker_registry.h"
 #include "content/browser/service_worker/embedded_worker_status.h"
 #include "content/browser/service_worker/embedded_worker_test_helper.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
 #include "content/browser/service_worker/service_worker_context_wrapper.h"
 #include "content/browser/service_worker/service_worker_handle.h"
 #include "content/common/service_worker/embedded_worker_messages.h"
@@ skipping 794 matching lines @@
 
   // Set the worker status to STOPPING.
   version_->embedded_worker()->Stop();
   EXPECT_EQ(EmbeddedWorkerStatus::STOPPING, version_->running_status());
 
   // Receive a response for a timed out request. The bad message count should
   // not increase.
   const int kRequestId = 91;  // Dummy value
   dispatcher_host_->OnMessageReceived(ServiceWorkerHostMsg_FetchEventResponse(
       version_->embedded_worker()->embedded_worker_id(), kRequestId,
-      SERVICE_WORKER_FETCH_EVENT_RESULT_FALLBACK, ServiceWorkerResponse()));
+      SERVICE_WORKER_FETCH_EVENT_RESULT_FALLBACK, ServiceWorkerResponse(),
+      base::Time::Now()));
 
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(0, dispatcher_host_->bad_messages_received_count_);
 }
 
 }  // namespace content