First step to refactor ServiceWorkerVersion to make event dispatching more modular.

content/browser/service_worker/service_worker_metrics.h

 // 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.
 
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_METRICS_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_METRICS_H_
 
 #include <stddef.h>
 
 #include "base/macros.h"
@@ skipping 54 matching lines @@
 
   // Used for UMA. Append-only.
   enum class StopStatus {
     NORMAL,
     DETACH_BY_REGISTRY,
     TIMEOUT,
     // Add new types here.
     NUM_TYPES
   };
 
-  enum EventType {
-    EVENT_TYPE_FETCH,
+  // Used for UMA. Append-only.
+  enum class EventType {
+    ACTIVATE,
+    INSTALL,
+    FETCH,
+    SYNC,
+    NOTIFICATION_CLICK,
+    PUSH,
+    GEOFENCING,
+    SERVICE_PORT_CONNECT,
     // Add new events to record here.
 
-    NUM_EVENT_TYPES
+    NUM_TYPES
   };
 
   // Used for UMA. Append only.
   enum class Site { OTHER, NEW_TAB_PAGE, NUM_TYPES };
 
   // Excludes NTP scope from UMA for now as it tends to dominate the stats and
   // makes the results largely skewed. Some metrics don't follow this policy
   // and hence don't call this function.
   static bool ShouldExcludeSiteFromHistogram(Site site);
   static bool ShouldExcludeURLFromHistogram(const GURL& url);
@@ skipping 34 matching lines @@
 
   static void RecordActivateEventStatus(ServiceWorkerStatusCode status);
   static void RecordInstallEventStatus(ServiceWorkerStatusCode status);
 
   // Records how much of dispatched events are handled while a Service
   // Worker is awake (i.e. after it is woken up until it gets stopped).
   static void RecordEventHandledRatio(EventType event,
                                       size_t handled_events,
                                       size_t fired_events);
 
+  // Records how often a dispatched event times out.
+  static void RecordEventTimeout(EventType event);
+
   // Records the result of dispatching a fetch event to a service worker.
   static void RecordFetchEventStatus(bool is_main_resource,
                                      ServiceWorkerStatusCode status);
 
   // Records the amount of time spent handling a fetch event with the given
   // result.
   static void RecordFetchEventTime(ServiceWorkerFetchEventResult result,
                                    const base::TimeDelta& time);
 
   // Records result of a ServiceWorkerURLRequestJob that was forwarded to
@@ skipping 15 matching lines @@
   // previous event ended).
   static void RecordTimeBetweenEvents(const base::TimeDelta& time);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ServiceWorkerMetrics);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_METRICS_H_