[Not for review] record detailed time breakdown of SW related requests.

content/common/service_worker/service_worker_event_dispatcher.mojom

 // Copyright 2016 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.
 
 module content.mojom;
 
 import "components/payments/payment_app.mojom";
 import "content/common/url_loader.mojom";
 import "mojo/common/string16.mojom";
 import "mojo/common/time.mojom";
@@ skipping 23 matching lines @@
   ExtendableMessageEventSource source;
 };
 
 // Renderer-side interface bound to ServiceWorkerContextClient for dispatching
 // events.
 interface ServiceWorkerEventDispatcher {
   // |fetch_event_id| is used internally when sending the response back to the
   // browser process.
   DispatchFetchEvent(int32 fetch_event_id, ServiceWorkerFetchRequest request,
                      FetchEventPreloadHandle? preload_handle)
-      => (blink.mojom.ServiceWorkerEventStatus status,
+      => (mojo.common.mojom.TimeTicks dispatch_time_ticks,
+          blink.mojom.ServiceWorkerEventStatus status,
           mojo.common.mojom.Time dispatch_event_time);
   DispatchPushEvent(PushEventPayload payload)
       => (blink.mojom.ServiceWorkerEventStatus status,
           mojo.common.mojom.Time dispatch_event_time);
   // Arguments are passed to the event handler as parameters of SyncEvent.
   // Ref: https://wicg.github.io/BackgroundSync/spec/#sync-event
   DispatchSyncEvent(string tag,
                     blink.mojom.BackgroundSyncEventLastChance last_chance)
       => (blink.mojom.ServiceWorkerEventStatus status,
           mojo.common.mojom.Time dispatch_event_time);
   DispatchPaymentRequestEvent(payments.mojom.PaymentAppRequest app_request)
       => (blink.mojom.ServiceWorkerEventStatus status,
           mojo.common.mojom.Time dispatch_event_time);
   DispatchExtendableMessageEvent(ExtendableMessageEvent event)
       => (blink.mojom.ServiceWorkerEventStatus status,
           mojo.common.mojom.Time dispatch_event_time);
 };